Agate to Zircon

Adularia

Adularia is a variety of orthoclase feldspar that is colorless to milky in appearance. It is mineralogically a potassium, aluminum, silicate feldspar found ...
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Banded Agate Cabochon in a Seed Pearl Frame.

Agate

Agate is a variety of chalcedony found in many different colors and degrees of translucency. There are several varieties of ...
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Alabaster carving on onyx background

Alabaster

Alabaster is a name used for gypsum and calcite but has also been used to indicate selenite. These minerals are easily worked ...
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Alexandrite and Diamond Ring.

Alexandrite

Alexandrite is a variety of chrysoberyl with a distinct change of color when viewed in incandescent and fluorescent light. The ...
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Almandine Garnet Ring.

Almandine

These deep purplish-red garnets were often featured in Victorian Jewelry. When they are cut en cabochon they are referred to as "carbuncles." For more ...
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Wild Strawberry Brooch with Amazonite Leaves.

Amazonite

Amazonite, a variety of the microcline series of the feldspar group, gets its name from the Amazon River. A gridlike structure visible in ...
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Art Deco Amber Teardrop Earrings. Signed Day, Clark & Co.

Amber

In the forest primeval, a creature calls…Its echo is heard for millions of years.Frozen in time; the drama unfolds--A death ...
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Amethyst Brooch with Pearl Surround..

Amethyst

Amethyst is the most coveted member of the quartz family. It can be found in shades ranging from a very ...
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Ametrine Diamond and Opal Dragonfly Brooch. Photo Courtesy of Christie's.

Ametrine

Ametrine is a variety of quartz consisting of both amethyst and citrine with zones of both purple and yellow. Most ...
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Andalusite var. Chiastolite.

Andalusite

Andalusite var. Chiastolite. Gems & Gemology: The Quarterly Journal of the Gemological Institute of AmericaAndalusite:Winter 1948, An 85 ct. Rough Andalusite ...
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Antique Demantoid Garnet Earrings.

Andradite

Andradite Garnet var. Demantoid ...
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Apatite

Gems & Gemology: The Quarterly Journal of the Gemological Institute of AmericaApatiteSummer 1962, Cat’s-Eye Apatite, p. 315, 2pp.Summer 1963, Yellow Cat’s-Eye ...
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Aquamarine Ring.

Aquamarine

Aquamarine is the blue variety of the mineral beryl. Most natural aquamarine is a pale bluish green, which was the ...
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Aragonite.

Aragonite

Aragonite is a naturally occurring crystal form of calcium carbonate and is a precipitate from salt and freshwater conditions. One ...
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Aventurescence in Goldstone.

Aventurescence

Aventurescence is a phenomenon in gemstones whereby glittering reflections of small inclusions of hematite or goethite in feldspar or fuchsite ...
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Aventurine

Aventurine Quartz Rough ...
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Azurite.

Azurite

Gems & Gemology: The Quarterly Journal of the Gemological Institute of America.Azurite:Fall 1960, Azurite and its Absorption Spectrum, p. 71, 1p ...
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Azurmalachite Specimen. Photo: Rob Lavinsky, iRocks.com – CC-BY-SA-3.0.

Azurmalachite

Sources Gem Reference Guide, Los Angeles: Gemological Institute of America, 1988. Pp. 22-23. Schumann, Walter. Gemstones of the World, New ...
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Benitoite.

Benitoite

Gems & Gemology: The Quarterly Journal of the Gemological Institute of America.Benitoite:Summer 1953, Benitoite, by Ehrmann, p. 317, 1p.Summer 1963, A ...
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Morganite

Beryl

Beryl is a beryllium aluminum silicate that occurs in every color of the rainbow but is colorless in pure form; ...
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Biwa Pearl and Diamond Brooch.

Biwa Pearl

Biwa pearls are a cultured pearl produced in a freshwater mussel native to Lake Biwa, Japan. Considered to be a non-nucleated pearl, they are ...
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Tiffany & Co. Bloodstone Intaglio Signet Ring with a Coat of Arms Seal.

Bloodstone

Who on this world of ours his eyesIn Aries opens shall we be wiseIf always on his hand there liesA ...
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Scottish Kilt Pin with Cairngorm

Cairngorm

Cairngorm is the name given to a citrine quartz variety with an amber or brown color traditionally mined in the Cairngorm Mountains in ...
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Conch Pearl Ring.

Calcareous Concretion

Calcareous concretions are pearl-like growths produced in mollusks that lack nacre. While still composed of calcite and aragonite, the crystals are much coarser. Some ...
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Calcite

Calcite

Sources Gem Reference Guide, Los Angeles: Gemological Institute of America, 1988. Pp. 41-43. Schumann, Walter. Gemstones of the World, New ...
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Pinctada Margaritifera Shell. Image Courtesy of parels-ael.nl

Calcium Carbonate

Calcium carbonate is a primary component of the shells of marine mollusks and pearls. The outer shells of mollusks are ...
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Victorian Garnet and Diamond Pendant.

Carbuncle

A large almandine garnet that is cut en cabochon. These deep purplish-red garnets were popular in Victorian jewelry. Victorian Garnet and Diamond Pendant ...
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Carnelian Intaglio Ring.

Carnelian

Carnelian Intaglio Ring. Carnelian (or cornelian) is the translucent red variety of chalcedony which in its turn is a form of cryptocrystalline quartz. It's been known ...
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Giuliano Cave Pearl

Cave Pearls

Cave pearls are not actually pearls, they are a calcareous concretion occurring in subterranean limestone caves. While they bear a resemblance to pearls, ...
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Art Deco Chalcedony, Amethyst, Glass and Diamond Bracelet by Black Starr and Frost

Chalcedony

Chalcedony is cryptocrystalline quartz. It is semitransparent to opaque and, depending on its color, chalcedony is further divided into several varieties. History ...
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Chlorastrolite.

Chlorastrolite

Chlorastrolite. Sources Gem Reference Guide, Los Angeles: Gemological Institute of America, 1988. Pp. 49-50 ...
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Cat's Eye

Chrysoberyl

Chrysoberyl is among the most brilliant of gems and its hardness is only surpassed by diamonds and corundum. The name ...
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Tumbled Chrysocolla.

Chrysocolla

Chrysocolla is an intense blue-green to light blue variety of chalcedony. It can be translucent to semitransparent and is usually cut en cabochon. Tumbled ...
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Chrysoprase and Lapis Bypass Ring

Chrysoprase

Chrysoprase is the name reserved for bright green cryptocrystalline quartz. It is a subvariety of chalcedony and owes its beautiful green color to the ...
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French Japonesque Cinnabar, Diamond and Onyx Jabot Pin

Cinnabar

French Japonesque Cinnabar, Diamond and Onyx Jabot Pin.  Online Texts on CinnabarSome Cinnabar Deposits in Western Nevada by Knopf ...
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Vintage Citrine Bracelet.

Citrine

Citrine is a yellow or golden variety of quartz, colored with iron. Natural citrine is relatively rare, occurring in Brazil, ...
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Belle Epoque Conch Pearl and Diamond Necklace.

Conch Pearls

A conch pearl is not technically a pearl at all, but a white or pink (sometimes brown or yellow), non-nacreous, product of ...
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Copal

Copal

Copal is a fossilized organic resin. This amorphous yellow to brownish material is often confused with amber, but amber is much ...
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Pair of Earrings Each with Four [[Coque de Perle]] (Nautilus Shell 'Pearls'); Bordered with Iron Pyrites Set in Silver. 1726-1775 © Trustees of the British Museum.

Coque de Perle

Coque de perle, from the French for 'pearl shell' was a Georgian faux pearl carved from the East Indian nautilus ...
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Art Deco Diamond and Coral Drop Earrings.

Coral

Coral is one of a very few organic gemstones. It consists of a mass of skeletons of tiny marine invertebrates ...
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Multi-Color Sapphire and Diamond Ring.

Corundum

Definition The mineralogical name for Al2O3, the corundum family encompasses the gem varieties sapphire and ruby. It crystallizes in the trigonal structure and ...
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Round Brilliant-Cut Cubic Zirconia.

Cubic Zirconia

Round Brilliant-Cut Cubic Zirconia. Cubic zirconia is a man-made material used to imitate diamond and other gemstones, commonly referred to as CZ. Cubic ...
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Antique Demantoid Garnet Earrings.

Demantoid

Antique Demantoid and Diamond Earrings. At the end of the reign of Nicholas I, Emperor of Russia, and the beginning ...
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Asscher-Cut Diamond Ring.

Diamond

Diamonds are valued for their incredible brilliance and hardness. Diamonds are chemically pure carbon, identical to the graphite used for ...
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Grossular Diopside.

Diopside

Grossular Diopside. Photo Courtesy of Rob Lavinsky, iRocks.com – CC-BY-SA-3.0 ...
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Druse

Druse

A surface covered with small projecting crystals, usually lining the sides of a cavity ...
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French Straight Line Emerald Bracelet.

Emerald

Emerald is the green variety of the mineral beryl, owing its vibrant color to a trace amount of chromium and ...
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Epidote Crystals.

Epidote

Epidote Crystals. Photo Courtesy of Rob Lavinsky, iRocks.com – CC-BY-SA-3.0 ...
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Feldspar var. Moonstone.

Feldspar

Feldspar var. Moonstone. Feldspar is a gem group that includes microcline, orthoclase, and plagioclase varieties. Each variety varies as to ...
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Fire Agate

Fire Agate

Fire Agate is an iridescent brown form of chalcedony. Fire Agate ...
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Pyrite

Fool’s Gold

Fool's gold is the popular name for pyrite. Pyrite looks like gold but is hard and brittle and lacks the malleability of gold. Fool's Gold aka ...
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Almandine Garnet Ring.

Garnet

The term garnet applies to a group of minerals with six main varieties. The varieties differ in chemical composition and ...
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Geuda Sapphire, Sri Lanka.

Geuda

The Sri Lankan geuda sapphire is a pale, translucent, and, until the discovery of heat treatments, useless variety of sapphire ...
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Gadolinium Gallium Garnet aka GGG

GGG

Gadolinium Gallium Garnet. A synthetic gemstone used as an early diamond substitute. GGG is manufactured by the Czochralski method and ...
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Conchoidal

Glass

Most glass is a man-made material sometimes used to simulate a gemstone. In that case, it's called paste. There are also three ...
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Tsavorite Garnet Ring.

Grossular

Tsavorite 1967 - Discovered in Northern Tanzania close to the Kenyan border by Campbell R. Bridges. Mining the deposit wasn't ...
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Hardstone Cameo Depicting Athena Wearing a Helmet with a Live Serpent on Top and a Secondary Visage on the Visor. Her Chest Armor Displays the Aegis of Zeus.

Hardstone

Hardstone Cameo Brooch made in Sweden. Hardstone is a term used loosely to refer to any hard gem material used ...
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These Antique Style Hematite Earrings are a Perfect Example of Metallic Luster.

Hematite

Hematite derives its name from the Greek word haema for blood. Thinly sliced hematite is a reddish color and, when rubbed against ...
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Hiddenite Parent Géry - Own work

Hiddenite

Hiddenite is the strongly pleochroic, bright green variety of spodumene. First discovered in North Caroline by W. E. Hidden in 1879. Sources ...
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Lalique Horn Comb. Photo Courtesy of Christie's.

Horn

Horn, commonly used in buckles, brooches, combs and hair ornaments was usually ox-horn, although it could be from any animal. With ...
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Hornbill Jewelry Suite.

Hornbill Ivory

In the fall of 2009 Stone Group Labs received an unusual item for identification. It turned out to be manufactured ...
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Horneblende.

Hornblende

Hornblende is a series of minerals, not a mineral in its own right. By composition, it is an iron-magnesium silicate that ...
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Hydrogrossular garnet with ruby and diamond. Bombé design Signed Webb for David Webb. Photo courtesy of Christie's.

Hydrogrossular

A polycrystalline mineral in the garnet group that occurs in a green or pink color, sometimes intergrown with idocrase. Bright green samples are sometimes used ...
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Vesuvianite aka Idocrase.

Idocrase

Idocrase is mineral species known as Vesuvianite and has several varieties. Sometimes erroneously referred to as "California Jade." Californite - ...
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Vauxhall Paste Ring. Circa 17th Century. Photo Courtesy of the Museum of London.

Imitation

Paste Used to Imitate Yellow Natural Gemstones in Costume Jewelry.An imitation is an object or gemstone which is used to ...
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Cordierite var Iolite

Iolite

Etymology The name, iolite, originates from the Greek word “iodes” meaning violet. It is often found under the misleading name ...
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Cartier Ivory Flower Brooch, c.1950. Photo Courtesy of Sotheby's

Ivory

Historically, this organic gem material referred to as Ivory came only from elephant tusks. Since elephants have become a protected ...
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Carved Natural Jade Pendant.

Jade

Jade is in the gemstone family that includes both Jadeite and Nephrite. The term Jade is still often interchanged with jadeite and nephrite ...
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Jadeite Ear Clips

Jadeite

Jadeite is a silicate containing sodium and aluminum. Jadeite occurs in a very wide range of colors, translucencies and textures ...
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Victorian Scottish Agate and Jasper Brooch.

Jasper

Scottish Jasper Brooch. Jasper is a member of the chalcedony family of gemstones. The name is of Greek derivation meaning spotted stone ...
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Victorian Faceted Jet Locket-Necklace Worn for Mourning.

Jet

A Jet Box with a Pietra Dura Inlay. Jet is a type of brown coal used since the Stone Age ...
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Kashmir Sapphire and Diamond Ring

Kashmir Sapphire

Kashmir Sapphire and Diamond Ring. Undoubtedly, the rarest and most beautiful of all sapphires are the legendary Kashmir. As befitting such otherworldly ...
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Retro 70 Carat Kunzite Ring with Bold Gold Mount.

Kunzite

Kunzite and Diamond Ring. Kunzite, a variety of spodumene, was named for George F. Kunz who was the first to describe ...
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Arts and Crafts Labradorite Brooch.

Labradorite

Labradorite is a mineral species of the plagioclase series of the feldspar group. Egyptian Revival, Victorian Scarab Brooch, c.1870 ...
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Lapis Lazuli Pendant.

Lapis Lazuli

Lapis lazuli is a rock aggregate made up from - predominantly - the minerals lazurite, sodalite, nosalite and hauyne. It ...
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Dionysus Rendered in Malachite.

Malachite

Malachite is green stone with irregular bands of lighter and darker green. The name malachite comes from the Greek word malache which ...
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Mallorca Pearl.

Mallorca Pearls

Majorica is a brand name of a high-quality pearl simulants produced on the Spanish island of Majorica at the Majorica S.A. company ...
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Black Enamel and Marcasite Pendant Watch

Marcasite

Marcasite is an iron sulfide mineral with an orthorhombic crystal structure. It is very brittle and unsuitable for jewelry. What ...
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Orange Fire Opal and Diamond Ring.

Mexican Fire Opal

Fire opal refers to the variety of transparent red, orange or orangy-red opal usually lacking play-of-color. Fire opal is cut en cabochon as ...
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Wild Strawberry Brooch with Amazonite Leaves.

Microcline

Amazonite in Albite Specimen. Photo: Rob Lavinsky, iRocks.com Microcline is a mineral series in the feldspar group. Amazonite is a light green ...
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Moldavite from Besednice, Bohemia.

Moldavite

Moldavite is formed from melted rock resulting from a meteorite strike. The surface of these small specimens can be rippled ...
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Art Nouveau Montana Sapphire and Pearl Pin.

Montana Sapphire

Tiffany Iris Corsage Brooch Set With Montanna Sapphires. © The Walters Art Museum. While most are familiar with the exotic ...
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Raymond Yard Moonstone Brooch and Earrings.

Moonstone

Moonstone is a variety of orthoclase feldspar, which is a sodium aluminum silicate. Moonstones can occur colorless, blue-white, white and ...
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Moss Agate Ring by Allsopp Brothers.

Moss Agate

Early 20th Century Moss Agate Match Safe. Moss agate is a translucent chalcedony with green moss-like inclusions, usually hornblende. When the hornblende oxidizes, the color ...
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Exquisite Carved Mother of Pearl Cameo Pendant.

Mother-of-Pearl

Mother-of-pearl a nacreous, lustrous, iridescent lining of the shell of a mollusk that can be carved and cut for jewelry ...
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Sulka Nephrite Jade and Sapphire Cufflinks

Nephrite

Nephrite Nephrite is a magnesium and calcium silicate with an interlocking fibrous structure that gives it extreme toughness. It is ...
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Conchoidal

Obsidian

Obsidian. Obsidian is a naturally occurring glass of volcanic origin, having an amorphous structure due to rapid cooling. It can ...
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Oligoclase Locality: Hawk Mine.

Oligoclase

Oligoclase is a mineral species of the plagioclase series of the feldspar group ...
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Victorian Onyx & Gold Mourning Necklace.

Onyx

Onyx is a variety of cryptocrystalline silicon dioxide or chalcedony. It is banded with contrasting colors making it an excellent ...
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Victorian Opal & Seed Pearl Pendant.

Opal

Opal is a hydrous variety of silicon dioxide. It is unlike other minerals because it is not crystalline! Opal is ...
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Opaline Glass Buttons c.18th Century. ©Victoria & Albert Museum.

Opaline Glass

Opaline glass was a gem imitation with a milky white to blue appearance generally cut en cabochon a popular daytime "gem" in ...
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Victorian Cat's-Eye Orthoclase Feldspar and Diamond Earrings.

Orthoclase

Orthoclase is a mineral series in the feldspar group. Moonstone Art Nouveau Orthoclase Feldspar (Moonstone) Pendant. Sources Gem Reference Guide, Los Angeles: ...
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Paraiba Tourmaline Platinum and Diamond Earrings

Paraíba

Paraiba Tourmaline and Diamond Ring and Earrings.Photo Courtesy of Christie's. Paraiba is a tourmaline variety noted for its neon blue and green ...
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Victorian Natural Pearl and Diamond Necklace

Pearl

Pearls are organic gems, produced in pearl oysters. Pearl oysters are not edible, and edible oysters do not produce gem ...
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Antique Peridot Pendant

Peridot

Peridot is the gem variety of the mineral chrysolite or olivine. It is a silicate of iron and magnesium found ...
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Petrified Tree in Petrified Forest National Park, USA. Image taken by Daniel Schwen on Sept 4th, 2004.

Petrified Wood

Petrified Wood is is wood that has been replaced by chalcedony aka silicified wood. In looks, it is very similar to patterned ...
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Arts and Crafts Labradorite Brooch.

Plagioclase

Plagioclase is a sub-series of the feldspar group. Labradorite Oligoclase Egyptian Revival, Victorian Labradorite Scarab Brooch, c.1870. Sources Gem Reference Guide, Los ...
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Bakelite.

Plastic

Plastics are man-made substances used in jewelry to imitate natural gem materials. Early plastics were organically derived, like the combination ...
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Prase

Prase

A leek green colored cryptocrystalline quartz aggregate with actinolite inclusions. Usually darker and less saturated than chrysoprase. In Greek the word Prason means leek, hence the name ...
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Prasiolite

Prasiolite is the green variety of Quartz. The material is extremely rare in nature and is only found in a handful ...
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Pyrite

Pyrite

Pyrite is an opaque yellow mineral with a metallic luster. Its cubic crystal system is evident in its outward appearance and specimens are ...
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Victorian Bohemian Garnet Earrings.

Pyrope

For over 600 years, the so-called 'Bohemian Garnets' from the Czech Republic amass the bulk of pyropes used in jewellery ...
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Quahog Pearl.

Quahog

A quahog is a bivalve clam native to the eastern seaboard of the United States. Used mostly as a food ...
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Quartz

Quartz is a commonly occurring variety of silicon dioxide. It often crystallizes into well-formed hexagonal prisms. Quartz occurs in many ...
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French Antique Silver, Enamel and Paste Necklace

Rhinestone

Rhinestone is the name given to rock crystal which is faceted to imitate diamond. It is also a name for ...
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Rhodocrosite

Rhodochrosite

Rhodochrosite is a manganese carbonate mineral with a transparent to translucent rose-pink color with undulating bands of white, gray or ...
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Rhodonite

Rhodonite

Rhodonite is a translucent to opaque pink to reddish color gemstone with patches or veins of black throughout. Usually cut en cabochon or drilled ...
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French Frosted Rock Crystal Quartz and Diamond Pin

Rock Crystal

Natural Color-Change Sapphire, Rock Crystal and Diamond Pendant. The Greek word krystallos meaning "ice", provides the basis for the origin of the ...
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Rose Quartz Ring

Rose Quartz

Rose quartz gets its name from its rosy pink color. Because of its massive turbid crackled nature rose quartz is ...
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No-Heat Ruby Platinum Diamond Ring

Ruby

Ruby is the red variety of sapphire or the mineral corundum. When corundum occurs in any color, other then red, ...
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Edwardian_Sapphire_Diamond_Ring

Sapphire

Sapphire is a variety of the mineral corundum that occurs in spectacular colors with great durability and stability. When corundum ...
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Tiffany and Co. Sard Cufflinks.

Sard

Sard is a translucent to semi-transparent variety of chalcedony. The colors are similar to carnelian but they are darker and less ...
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Victorian Sardonyx Cameo Drop Earrings.

Sardonyx

Sardonyx is a brown and white banded variety of onyx primarily used in glyptography. Antique Victorian Sardonyx Seal Fob. SourcesGem Reference Guide, Los ...
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Allalin Glacier, Saas Valley, Zermatt-Saas Fee, Wallis, Switzerland

Saussurite

Saussurite is a rock formed from green zoisite in combination with epidote, white feldspar and other minerals ...
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Victorian Seed Pearl and Diamond Heart Pin - Pendant.

Seed Pearl

Seed pearls are very small; less than a one-quarter grain in weight, smaller than 2mm in size and off-round in shape. Historically they occurred ...
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Serpentine Paten with Gold Inlay Surrounded by Gems in Gold 1st Century BC. In the Collection of the Louvre, Paris.

Serpentine

Serpentine is not a single crystal gem, but a rock-forming mineral group. The name may derive from the Latin serpentinus due to ...
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Shale

Shale

A fissile (easy to split) sedimentary silicate-rich rock with particles mostly in the silt and clay size. The color is ...
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Victorian Shell Cameo Depicting Archangel Michael Slaying Satan.

Shell

Shell is the organically formed hard outer part of a saltwater or freshwater animal. Shells of all types have been ...
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Verdura Smoky Quartz and Tourmaline Cocktail Ring This item has been sold

Smoky Quartz

Smoky Quartz is a brownish-black to greyish color variety of quartz. Cairngorm is the Scottish term for smoky quartz. Smokey ...
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Cut Spessartite from Loliondo, Tanzania. Image by Tim Spauwen.

Spessartine/Spessartite

Cut Spessartite from Loliondo, Tanzania.Image by Tim Spauwen Spessartine was first discovered in the Spessart Mountains of Germany from which ...
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Vintage Red Spinel Ring

Spinel

Spinel is a magnesium aluminum oxide, occurring in many colors with excellent durability. Natural spinel is really a group of ...
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a 47.32 ct Kunzite, photo courtesy of Constantine Wild, Idar-Oberstein

Spodumene

The name spodumene derives from the Greek meaning burnt to ashes describing the non-gem colorless or gray variety of spodumene. There are ...
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Boule

Synthetic Corundum

External LinkHistory of Synthetic Corundum: http://www.dtic.mil/dtic/tr/fulltext/u2/a460239.pdfGems & Gemology: The Quarterly Journal of the Gemological Institute of America.Synthetic Corundum:Fall 1939, Lined Foil Back ...
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Tiffany - Schlumberger Tanzanite and Diamond Brooch.

Tanzanite

Tanzanite is a variety of blue zoisite that was discovered in the Merelani District of Tanzania in 1967. It's compelling ...
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Thulite (Green) with Ruby (Red)

Thulite

SourcesGem Reference Guide, Los Angeles: Gemological Institute of America, 1988. Pp. 262-264.Schumann, Walter. Gemstones of the World, New York: Sterling ...
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Cartier Tiger's Eye and Diamond Ring

Tiger’s-Eye

Tiger's-eye is chatoyant quartz. It ranges in color from brownish yellow to brown or reddish brown with iron oxide being the ...
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Blue Topaz and Diamond Ring.

Topaz

Topaz is an aluminum, hydroxyl-fluorine silicate, found primarily in gem pegmatites. Minas Gerais in Brazil is the largest producer of ...
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Victorian_Tortoiseshell_Butterfly_Brooch

Tortoise Shell

Tortoise Shell Locket and Chain. Tortoise shell is the name for the outer blades covering the upper shell of the ...
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Art Nouveau Pink Tourmaline Pendant Brooch.

Tourmaline

Tourmaline is a group of minerals displaying the widest variety of gemstone color in the mineral kingdom. The spectral assortment ...
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Trapiche Emerald from Muzo Mine, Colombia.

Trapiche

A trapiche emerald is one with a central green area radiating six green arms giving the gem a flower-like appearance. These intense green ...
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Antique Turquoise and Diamond Ring

Turquoise

Turquoise is chemically a hydrous copper aluminum silicate, occurring in microcrystalline nodules. It has been coveted and admired throughout our ...
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Tumble Polished Unakite Pebbles.

Unakite

Tumble Polished Unakite Pebbles ...
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Red Vauxhall Glass Maltese Cross Brooch and Earring Suite, c.1825

Vauxhall Glass

Through the eighteenth century and on into the middle of the nineteenth, Vauxhall glass was a popular gem substitute. Intense ...
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Verneuil Ruby showing typical curved striae under magnification

Verneuil

Auguste Victor Louis Verneuil (1856-1913) Auguste Victor Louis Verneuil is the father of gemstone synthesis. Born a watchmaker's son, Verneuil became a ...
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Yttrium Aluminum Garnet - YAG

YAG

Yttrium Aluminum Garnet - YAG ...
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Vintage Blue Zircon RIng.

Zircon

Zircon is a zirconium silicate that crystallizes in the tetragonal crystal system. It is highly dispersive and brilliant. Natural zircons ...
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Thulite (Green) with Ruby (Red)

Zoisite

Zoisite is named for the famed collector Sigmund Zois. Discovered in Austria in 1805 in the Sau-Alp mountains, zoisite was ...
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