Gem Cutting

4 C’s

Diamonds, by nature of their unique characteristics, can be evaluated much more precisely than other gems. Their extreme hardness allows ...
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3rd Century, Roman "Pointed" Diamond Ring. © The Trustees of the British Museum.

A History Of Diamond Cutting

This article gives an overview of the history of diamond cutting. For detailed descriptions of the different diamond cuts see ...
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6.79 Carat French-Cut Diamond, Angeled View.

Adamantine Luster

Adamantine is the term used to describe the luster exhibited by diamonds and gems with a Refractive Index of 1.9 - 2.5. The root word adamant ...
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Asscher-Cut Diamond Ring.

Asscher Cut

In 1902 the Dutch diamond cutter Joseph Asscher developed the cut that would carry his name on into the future ...
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Art Deco Baguette Diamond Ring.

Baguette Cut

The baguette cut represents an elongated, rectangular table cut. The modern version, as in the ring on the right, was (re)introduced ...
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Brilliant-Cut Diamond Ring.

Brilliant Cut

Diamonds as We Know Them When we think of a diamond, most of us will form an image in our ...
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Mid-Nineteenth Century Fuschia Design Diamond Brooch with en Tremblant Stems Suspending Detachable Briolette Cut Diamonds. Photo Courtesy of Christie's.

Briolette Cut

Edwardian Garland Motif Pendant Suspending a Briolette Cut Diamond. Briolettes are drop shaped, multi faceted stones. They are unique in ...
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Diamond Bruting Machine - Rounding 2 Diamonds by Grinding them Together as They Spin.

Bruting

Bruting is a process in diamond cutting that establishes the girdle outline. Once the height and width of the diamond are determined, it is ...
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Edwardian Rose Cut Diamond Natural Pearl Calibre Ruby Ring Circa 1900.

Calibré

Calibré refers to gemstones cut precisely to fit a specific design. Usually, calibré cut stones are rectangular or square but can be ...
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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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Crown, Girdle, Pavilion

Crown-Gemstone

Crown, Girdle, Pavilion.The crown of a gemstone refers to the part above the girdle ...
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Antique Cushion-Cut Diamond Ring.

Cushion Cut

Cushion cut is a sexy and romantic name for a squarish ("cushionesque") antique brilliant-cut diamond, sometimes referred to as an ...
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6 Loose Diamonds in Different Cuts.

Diamond Cutting & Grading

Diamond CutsMain Article  Gems & Gemology: The Quarterly Journal of the Gemological Institute of America Diamond Cutting & Grading: Summer 1936, ...
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Emerald-Cut Diamond Ring

Emerald Cut

The Emerald Cut is a rectangular step cut design which means it has horizontal facets which differ in angles of ...
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Sapphire Cabochon Ring.

En Cabochon

Imperial Jadeite and Diamond Art Deco-Style Ring.The phrase en cabochon (from French: knob) is the term applied to a gemstone ...
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7.41 Carat European-Cut Diamond Drop Earrings

European Cut

Diamonds cut in the later 19th and early 20th-century cutting houses are called 'Old European Cuts', a term which indicates ...
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The Crown is Comprised of the Table, Main, Star and Girdle Facets.

Facet

Definition A facet is a flat, planar surface ground onto a gemstone or diamond. Facets can be produced in many shapes and sizes ...
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Glass Filled Ruby

Filling

Filling is a gemstone enhancement method which indicates a broad range of treatments. From simple oiling to resin impregnation to the filling ...
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6.79 Carat French-Cut Diamond, Top View.

French Cut

Art Deco French-Cut Diamond Straightline Bracelet.The term "French Cut" does not refer to the country of origin, rather It refers ...
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Crown, Girdle, Pavilion

Girdle

Crown, Girdle, PavilionThe band on a faceted stone, around the widest circumference, which creates the separation of the crown and ...
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Shell Cameo Habille with Earring, Necklace and Diadem, Set with Diamonds. Circa 1920's.

Habille

A habillé is a cameo in which jewelry, earrings, for instance, is incorporated in the portrait. These highly collectible cameos came in ...
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Swedish Heart-Shaped Diamond Ring.

Heart Shape

Heart-Shaped Diamonds.Main Article   ...
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Jade Hololith Ring. Image Courtesy of Christie's.

Hololith Ring

A hololith ring is a ring which is cut from a single, solid mineral. Many jade and chalcedony rings are cut this way. Jade Hololith Ring.Image Courtesy ...
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Victorian Onyx Intaglio Ring.

Intaglio

Intaglio is a technique which dates back to antiquity and is still in use at present. Patterns, designs or - ...
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Hardstone Cameo Brooch made in Sweden.

Lapidary

A lapidary is a person who cuts or carves and polishes gemstones, stone, minerals and other hard materials excluding diamonds. Lapidaries render decorative ...
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Laser

Laser is an acronym for Light Amplification by Stimulated Emission of Radiation. A powerful, coherent, straight-line beam of light, very ...
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Art Deco Lozenge Shape Diamond and Sapphire Ring.

Lozenge Shape

A lozenge-shaped diamond is one that is rhomboid in outline. This geometric outline is also known as "diamond" shaped, but ...
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Natural Diamond Macle, by Rob Lavinsky, iRocks.com – CC-BY-SA-3.0

Macle

Diamond Macle.Macle is a gemological term referring to triangular shaped twinned crystals of diamond rough. Macles are usually quite flat but are ...
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Marquise-Cut Diamond.

Marquise Cut

The Marquise Cut (a.k.a. the Navette Cut after the Latin 'navalis', meaning boat-shaped) can be traced back to Paris around ...
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Pink, Yellow and Light Brown Diamond Melée. Photo Courtesy of Bonhams.

Melée

The term melée is used to indicate very small cut stones, usually used as side stones around a bigger center ...
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Mosaics in Jewelry

...There were couches of gold and silver on a mosaic pavement of porphyry, marble, mother-of-pearl and other costly stones.1 ...
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Mounting on Moor

"Mounting on moor" refers to the tinting of diamonds on the pavilion to create a more uniform color and to hide dark ...
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Around the Same Time Diamond Cutting Began in Europe the Indians Started Fashioning Diamonds. Who Influenced Who Here Isn't Clear but it is a Fact that the Designs Produced Differ a Lot From Each Other. The Best Known Indian Cut is the Mughal Cut, Accurately Described by J.B. Tavernier in his Book 'Six Voyages'.

Mughal Cut

Around the Same Time, Diamond Cutting Began in Europe the Indians Started Fashioning Diamonds. Who Influenced Who Here Isn't Clear ...
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1,109-Carat Diamond, Lesedi La Rona, from the Lucara Mine, Botswana. Photo Courtesy of the New York Times.

Naif

A Naif is the outer surface of an unpolished and uncut diamond. When cutting a diamond a small bit of this ...
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Victorian Navette Shaped Pearl and Diamond Ring.

Navette

Navette is another term to describe a marquise shaped gemstone or jewelry contour. Pointed at both ends with equally curved sides, the ...
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Nicolo

Egyptian Nicolo Intaglio, Second Century AD.The Metropolitan Museum of Art. Nicolo is a cameo or intaglio that is carved in onyx in such a way that ...
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Opus Sectile (Marble Floor Inlay) from the Hadrian's Villa (Piccole Terme) Near Tivoli in Italy.

Opus Sectile

Opus Sectile is a mosaic style where slabs of stone are shaped and fitted together as a jigsaw puzzle. It ...
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Oval Fancy Deep Brownish Yellowish Orange. Diamond with Two Pair of Marquise-Cut Side Stones.

Oval Shape

Oval Diamond Three Stone Ring.Main Article   ...
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Crown, Girdle, Pavilion

Pavilion

Crown, Girdle, Pavilion.The pavilion is the part of a gemstone below the girdle ...
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Pear-Shaped Diamond.

Pear Shape

Pear-shape refers to the shape of a faceted gemstone that comes to a point at one end and is rounded at the opposite ...
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3rd Century, Roman "Pointed" Diamond Ring. © The Trustees of the British Museum.

Point Cut

Natural PointsA Natural Octahedronby Rob Lavinsky, iRocks.com – CC-BY-SA-3.0 Diamonds crystallize in various forms of which the octahedral and dodecahedral ...
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Princess Cut

Being one of the more modern diamond cuts the Princess Cut is often indicated as being a square brilliant but this is ...
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Radiant-Cut Diamond.

Radiant Cut

Radiant-Cut Diamond.Main Article   ...
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Georgian Floral Motif Diamond Engagement Ring.

Rose Cut

Rose-Cut Diamonds: Their Beauty and Allure Early "diamond cuts" were essentially diamonds altered with only minor changes and a light polishing before ...
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5 Petal Rosette Composed of Diamonds Cut to Form this Shape.

Rosettes

Rosettes are floral depictions built up out of several diamonds. They were used to make the most out of small ...
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Victorian Egyptian Revival Scarab Ring.

Scarab

A scarab is a beetle and was a recurring motif in Ancient Egypt. Ancient, as well as contemporary renditions in ...
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Round Brilliant-Cut Exhibiting Scintillation.

Scintillation

Scintillation is the term that describes the flashes of light reflected off the facets of a gemstone as it moves. Victorian Cluster Ring with ...
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Shield Cut

Shield Cut

The term shield cut, as suggested by Tillander, indicates all historical triangular cuts. The basic blueprint comes from half an ...
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Etruscan Revival Cameo Silhouette Hardstone Earrings.

Silhouette

Etruscan Revival Cameo Silhouette Hardstone Earrings.A silhouette (named after French finance minister Etienne de Silhouette) was originally a portrait "en ...
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A New Single Cut.

Single Cut

Old Single Cut An Old Single Cut; a Square Table Cut with Faceted Corners.The Old Single Cut is a variation ...
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Smalti Used to Create Filati and Tesserae.

Smalti, Filati, and Tesserae

Smalti Smalti is a type of glass paste (not as brittle as ordinary glass) with each individual color poured into ...
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Swiss Cut

Swiss Cut

Swiss cut diamonds are the late 19th-century predecessor to the 20th century Single Cut. Their crowns are built up out of a table facet, ...
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Table-Cut

Table Cut

The term 'table cut' is used to indicate all types of cuts that have a table facet. Cuts that fall ...
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The Crown is Comprised of the Table, Main, Star and Girdle Facets.

Table Facet

The Crown is Comprised of the Table, Main, Star and Girdle Facets.The table is the largest facet on the crown of a gemstone. This horizontal ...
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Triplet

Triplet

A triplet is a kind of composite stone that contains out of three parts. A good example is the opal triplet which often is ...
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Bohemian Pyrope Garnet Cluster Brooch, c. Mid-19th Century.

Turnau

Turnau is the German name for the town Turnov in the Czech Republic (Bohemia). It has traditionally been the trade ...
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Twinning

Growth process in which a twin crystal is produced. Often seen as fine parallel lines ...
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Notes:

  1. Esther 1:6