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

In 1902 the Dutch diamond cutter Joseph Asscher developed the cut that would carry his name on into the future ...
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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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Belperron

1900-1983 Suzanne Belperron. Suzanne Belperron was born Madeleine Suzanne Vuillerme on September 26, 1900 to Jules Alix Vuillerme and Marie ...
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Brilliant Cut

Brilliant Cut Diamonds as We Know Them When we think of a diamond, most of us will form an image ...
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Briolette Cut

Briolette Cut Edwardian Garland Motif Pendant Suspending a Briolette Cut Diamond. Briolettes are drop shaped, multi faceted stones. They are ...
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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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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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Carbuncle

A large almandine garnet that is cut en cabochon. These deep purplish-red garnets were popular in Victorian jewelry ...
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Crown-Gemstone

Crown, Girdle, Pavilion. The crown of a gemstone refers to the part above the girdle ...
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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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Diamond Cutting & Grading

Diamond Cuts Main Article Gems & Gemology: The Quarterly Journal of the Gemological Institute of America Diamond Cutting & Grading: Summer ...
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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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En Cabochon

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

Art Deco French-Cut Diamond Straightline Bracelet. The term "French Cut" does not refer to the country of origin, rather It ...
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Gill’s Index of G&G Articles 1934-1980

AmberSpring 1943, Amber, by Briggs, p. 78, 3pp.Fall 1959 A Pink Amber-Like Resin from Southern Calif., p. 337, 2pp.Fall 1963, A Painted Amber, ...
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Girdle

Crown, Girdle, Pavilion The band on a faceted stone, around the widest circumference, which creates the separation of the crown ...
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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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Heart Shape

Heart-Shaped Diamonds. Main Article ...
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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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Intaglio

Intaglio Coat-of-Arms. Intaglio is a technique which dates back to antiquity and is still in use at present. Patterns, designs ...
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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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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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Luigi Podio

Luigi Podio was the master mosaicist for the famed archaeological revival jeweler, Castellani. Podio's workshop in Rome created some of the ...
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Macle

Diamond Macle. Macle is a gemological term referring to triangular shaped twinned crystals of diamond rough. Macles are usually quite flat but ...
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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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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.Esther 1:6 ...
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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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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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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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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

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 Shape

Oval Diamond Three Stone Ring. Main Article ...
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Pavilion

Crown, Girdle, Pavilion. The pavilion is the part of a gemstone below the girdle ...
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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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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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Point Cut

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

Radiant-Cut Diamond. Main Article ...
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Roman Vincent

Roman-Vincent Jeuffroy (1749-1826) was a famous gem carver who led the school instigated by Napoleon Bonapart to encourage the art ...
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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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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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Scarab

A scarab is a beetle and its portrait was often carved in gemstones by Ancient Egyptians ...
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Scintillation

Scintillation is the term that describes the flashes of light reflected off the facets of a gemstone as it moves ...
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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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Silhouette

A silhouette (named after French finance minister Etienne de Silhouette) was originally a portrait "en profile" cut from black card ...
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Single Cut

Old Single Cut The Old Single Cut is a variation to the early Table Cuts and is encountered from the earliest days ...
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Smalti

Smalti are small glass cubes which are chiseled from a glass rod to form an irregular surface. These highly reflected opaque tesserae were set ...
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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

The term 'table cut' is used to indicate all types of cuts that have a table facet. Cuts that fall ...
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Table Facet

The table is the largest facet on the crown of a gemstone. This horizontal facet is measured from corner to corner ...
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Horners Co logo

The Horner’s Co.

Much like the guilds that existed throughout Medieval Europe, the Horner's Company oversaw the trade and processing of all horn around the ...
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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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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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