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Our goal at is to educate the consumer about every facet of the diamond and antique jewelry industry. Here is a list of the many terms often used in the jewelry industry we think you should know.


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Abraded culet: A chipped or scratched culet within a diamond.

Abrasion: A bruise or scratch on the surface of a diamond.

AGS: American Gem Society. Professional organization formed in 1934 by several independent jewelers. Known for starting cut grade. Antwerp: diamond-cutting center in Belgium.

Appraisal: A monetary evaluation, usually performed for insurance purposes by a gemologist.


Baguette: A rectangular cut diamond with squared corners.

Bearding: Small feather-like cracks along the girdle of a diamond. Bezel: Setting which holds a diamond or gemstone in place on all sides at the girdle. Blemish: A scratch on the surface of a diamond. Brilliance: The intensity and amount of light reflecting from inside a diamond or gemstone. Brilliant cut: Brilliant cut diamond which has 57 or 58 facet cuts.


Cabochon: A gemstone cut that creates a dome shape with no facets.

Carat: Unit of weight for diamond and gemstones.

Clarity: Measures the degree to which a gemstone is free from flaws.

Cleavage: Tendency of a crystalline material to break in certain directions.

Clarity Enhancement: Imperfections that are treated in diamonds are with the insertion of a material with the same optical properties as diamonds to fill a tiny fracture.

Cloud: Group of tiny white inclusions in a diamond.

Color: In diamonds, the color scale ranges from D (colorless) to Z (yellow).

Comfort Fit: Ring design in which the edges of the shank are rounded for maximum comfort.

Crown: The facets or portions of a diamond or gemstone located above the girdle.

Culet: A small polished facet located at the base of a diamond or gemstone.

Cultured Pearl: pearls which have been created artificially.

Cut: refers to the geometric proportion that dictates the reflection and refraction of light within a stone.


Depth: The distance from a gemstone’s table to its culet (top to bottom).

Depth percentage: The measurement of a diamond or gemstone’s depth.

Dispersion: The separation of white light into the full color spectrum. Often described as the fire or rainbow when discussing diamonds.


Emerald Cut: Rectangular gemstone with cut corners.

Enhanced diamond: Diamonds that have been treated with the insertion of a material or lazer drilled.

Extinction: Dark or black spots in colored stone.


Facet: surface of a diamond or gemstone.

Faceted Girdle: Girdle that has been cut with facets.

Fancy Shapes: A gemstone shape other than a round diamond.

Feather: Internal flaw or inclusion in a diamond or gemstone.

Fire: The sparkles of flashes of spectral colors emitted from diamonds and other gemstones.

Flaw: internal inclusion or fracture of a diamond or gemstone.

Flawless: a diamond or gemstone that lacks internal or external blemishes when using a 10 power magnification or microscope.

Fluorescence: Luminescence that appears when certain diamonds are exposed to ultraviolet light.

Fracture: Cracks, feathers or chips in a diamond or gemstone.

Full cut: Gemstone with 58 facets.


Gemologist: Gemstone specialist trained in gem or diamond field.

Gemology: study of diamonds and gemstones.

GIA: Gemological Institute of America. Non-profit organization specializing in grading diamonds and gemstones.

Girdle: The narrow rim around a gemstone separating the crown from the pavilion.


HPHT: treatment used for off color diamonds involving high pressure and high temperature improving color and clarity of a diamond.


Imperfection: inclusions within a diamond or gemstone.

Inclusion: Visible internal flaws in a diamond or gemstone.

Irradiation: Treatment performed on diamonds and gemstones to enhance color. K Karat: Standard measure of gold purity.


Laser Drilling: Treatment used to enhance a stone’s clarity.

Loupe: Small magnifying glass used for analyzing and viewing diamonds and gemstones.

Luster: The appearance of a material’s surface, as determined by the quantity and quality of light reflected.


Marquise: Oval shaped gemstone with ends sharpened to points.

Milgrain: Tiny beads of metal used to decorate bands of metal especially used to perfection in the early 1900's.

Mounting: Method of holding gemstones and diamonds in place with prongs.


Oiling: Temporary treatment used to enhance the color of a diamond or gemstone.

Opera: A strand of pearls 32 inches in length.


Pave Setting: Style of setting smaller diamonds as close together as possible.

Pavilion: The portion of a gemstone located below the girdle.

Pit: Indentation on the surface of a diamond or gemstone.

Platinum: Precious metal that is far harder than gold.

Plot: Diagram of a diamonds clarity characteristics.

Point: One-one hundredth (0.01) of a carat.

Princess Cut: Square cut diamond with the faceting of a round diamond.

Prong : finger bent around the girdle of a gemstone to hold it securely in place.

Proportion: Mathematical representation of a diamond or gemstones symmetry.


Recutting: Refinishing a polished stone in order to either repair or improve the stone’s clarity.

Reflection: Light rebounding off the polished surfaces of a diamond or gemstone.

Refraction: Bending of light waves within a diamond.

Rough: An uncut or unpolished diamond or gemstone.


Setting: Method of holding gemstone or diamond in place.

Shank: Part of the ring that encircles the finger.

Single Cut: a table with appx 16 facets.

Solitaire Ring: ring containing a single diamond or gemstone.

Symmetry: Uniformity of a gemstone’s cut and facets.

Synthetic Stone: gemstone grown in a lab.


Table: Largest facet on a gemstone and diamond. The table sits atop the crown and allows light to enter and exit. creating the stone’s brilliance.

Table percentage: Diameter of a gemstone divided by the size of the table.

Tutti Frutti: Jewelry set with multi colored gems carved in shapes of leaves, flowers and berries and often in a basket design.