G

Gaillard: French Art Nouveau era jewelry known for Japanese motifs.

Gallery: the undercarriage of a ring mounting.

Gardinetto or giardinetto/giardinetti (Italian for ‘little garden’): Jewelry item, often a brooch, in the form of a vase of flowers or a flower basket.

Garnet: Type of gemstone.

Garrard: British jewelers since 1843.

Gaud: a charm or trinket typically found at the end of a rosary.

Geiss: Johann C. Geiss (1771-1846) was an innovator in the field of iron jewelry.

Gem: a precious or semi-precious stone.

Gemologist / gemology: One who is an expert on gemstones / study of gemstones.

Geometric Style: A style of jewelry design that reached its zenith in the 1920s-1930s; another name for Art Deco or used to describe an aspect of Art Deco.

Georgian Jewelry: era of antique jewelry from the years 1714-1837.

Gemstone Surface Enhancements: gemstone treatments such as foiling.

Gem Phenomena: gem phenomena, or optical phenomena, are the observable characteristics of gemstones.

German Silver (also called ‘nickle silver’ or ‘alpaca’): A misnomer for silver, this is actually an alloy that looks like silver.

GGG Gadolinium Gallium Garnet: A synthetic gemstone used as an early diamond substitute.

GIA: abbreviation for the Gemological Institute of America.

Giacomo Raffaelli (1753 – 1836): an Italian artist who specialized in mosaic jewelry.

Gilding: A process of applying a thin gold film to another surface.

Girandole: A type of chandelier-like design often seen in brooches and earrings of the 17th and 18th centuries. Generally, three pear-shaped gems, usually diamonds are suspended from the main component.

Girasol: Any gem variety that has a floating, milky sheen that moves about as the stone is turned or as the light source is moved.

Girdle: The thin band that runs around the widest part of a diamond.

Gimmel Ring: (from the Latin gemellus meaning twin) is a ring that is made up of two or more separate hoops, sharing a split shank.

Giuliano, Carlo (1831-1895): Italian jeweler.

Glove Ring: A ring that is worn over a glove.

Glyptography: the art of gemstone carving used in cameo and intaglio.

Golay Fils & Stahl: Geneva jeweler, founded in 1837

Gold: A type of metal

Gold Alloy: A mixture of metals of which gold is one.

Gold Electroform: A technique in which a negative mold is put into a special gold bath. Through the use of electricity the metal builds up on the mold forming the object.

Gold Electroplating: Electroplating involves coating one metal with another through the use of a chemical bath and an electric current.

Gold-filled: A layer of gold applied to another, usually base metal, surface.

Gold plated: coated with gold by the processes that produces gold-filled or rolled gold plate.

Gold-in-quartz: A variety of quartz that is colorless or white with inclusions or granules of gold running through it.

Gold Leaf: An extremely thin layer of gold amounting to approximately 0.005 mm in thickness.

Gold Nugget: A lump of native gold that is generally found in river or stream beds.

Gold Smudge: a colored smudge, left by jewelry or other metallic object, on the skin of the wearer.

Gold Wash: a gilded layer with a thickness less than 0.2 micron.

Gold Wire: basic component of many jewelry items throughout history; extremely thin and long strand of gold.

Goldsmith: one who works with gold

Gourmette Chain (also called ‘curb chain’): a chain which is created from round or oval interlocking links which are twisted until they are flattened out.

Gorget: a flat metal collar either open at the back, penannular, or a complete circle with a hinged opening.

Gothic Revival Jewelry: Jewelry inspired by the gothic styles of the 12th and 13th century.

Gun Metal: (Also known as red brass). Alloy of copper, tin and zinc.

Gutta Percha: a hard rubber that can be made into black coloured jewellery (popular in Victorian era). 

Graduated: of increasing or decreasing size.

Graduated strand: A necklace with the largest gem in the center and progressively smaller gems towards the clasp.

Graff (1962-present): Diamond dealer and retailer.

Grain: the smallest unit of measure in the Troy system.

Grand Era – 1861-1880 The era began in 1861 with the death of Prince Albert, which plunged Queen Victoria into mourning for decades to come.

Grand Period 1860-1885: Victorian era. Also called ‘mid-Victorian’.

Graver: a cutting tool used to engrave metal.

Greasy Lustre: the term used for the surface reflection on certain materials (ie Serpentine.)

Greek Key: geometric meanders which were used in ancient Greece as a border decoration, used as motifs during the Greek Revival of the 1800 and 1900s.

Granulation: A textured design formed by minute grains of gold, soldered onto an object.

Green Gold: A gold alloy that utilizes a higher percentage of silver to create a greenish tinted gold.

Grey Gold: an alloy of gold and iron or gold, silver and iron that is a pale grey color.

Grissaille: A monochrome enameling technique displaying shades of gray, black and white.

Guard Ring: A type of interior “U”-shaped ring placed within a ring for comfort.

Guilloche (French): An enameling technique (translucent polychrome enamel placed on top of a geometric engraved pattern).

Gutta-Percha: A plastic or rubber-like substance produced from the natural fluids of certain Malaysian trees.

Grisaille (French ‘in the grey’): an enameling process that begins with a layer of black enamel, then white enamel is used to apply the design and then details are scratched through to the black.

Grossular: Gemstone.

Gueda: Colorless Sri Lanka sapphire that can be made blue with heat treatments.

Guild: Organization of workers.

Guirlande: a decorative hanging ornament, usually in the form of a flower wreath.

Gunmetal: an alloy of 90 percent copper and 10 percent tin. Also blue-black finish caused by electroplating a coat of iron on an item and coloring it in a chemical solution.Gypsy Setting: Flush setting, used in rings (Gypsy Rings).

Gübelin: Swiss jeweler and sons (late Victorian).

Gypsy Setting: setting where the gem sits flush with the surface of the metal (also called ‘flush’ setting.)


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