Gablonz (Jablonec nad Nisou) is a city in the Czech Republic, in
Bohemia, that is a center of jewelry making. Before World War 2,
Gablonz was a center of high-quality glass-blowing, bead-making,
and other costume-jewelry related products.
A series of small vertical, diagonal or twisted grooves applied
as a border decoration on silverware.
Gagate (popularly known as jet) is fossilized coal. It is a hard,
lustrous black stone that was used in mourning jewelry during the
Victorian era (especially after Queen Victoria's husband died and
she went into a long-lasting mourning, affecting fashion). Jet is
frequently cabochon cut. Gagate has been mined near Whitby (on the
Yorkshire coast of England) since prehistoric times. It is also
found in Spain. France, Germany, and Russia, but these other sources
are said to be inferior to the harder, more elastic Whitby jet.
Jet/gagate has a hardness of 2.5-4 (quite soft) and a specific gravity
of 1.30-1.35 (it is relatively lightweight). Jet leaves a brown
streak. When burnt with a red-hot needle, jet smells like coal Black
glass and plastics are often used to imitate jet (glass is much
heavier and harder than jet) - jet is warm to the touch.
Gahnospinel is a rare blue spinel stone that is high in zinc and
magnesium. It can only be distinguished from most spinel by its
high specific gravity and high refractive index. Gahnospinel has
a hardness of 8, a specific gravity of 3.97. Its chemical formula
is (Mg, Zn)Al2O4.
A type of mounting with a pierced, openwork design resembling the
gallery, (rear platform), of an early sailing ship.
A jewelry style popular in the early 20th century made possible
by the introduction of the widespread use of platinum and characterized
by lightness and delicacy that employed motifs such as garlands,
ribbon bows, swags, and tassels.
Garné was a trademark of the Garne jewelry company, New York,
New York, USA, which produced average-quality costume jewelry. The
Garne mark was first used in June, 1945. The small Garne company
made necklaces, pins, bracelets, earrings, watch fobs, and chatelaines
A family of stones having many varieties differing in color and
in their constituents, but all are silicates with the same isometric
crystallization and conforming to the same general chemical formula.
Garnet is a very commonly found in gneiss and mica slate. The name
is derived from its resemblance in color and shape to the seeds
of the pomegranate. The most common color of garnets range from
light red to violet or plum-red, but can also be white, green, yellow,
brown, and black varieties. It seems as though every shade and color
of garnet is given its own name. Known varieties of garnet include
Andradite, Tsavorite, Grossularite, Essonite, Pyrope, Almandine,
Spessartite, Melanite, Allochroite, Ouvarovite, Demantoid, and Rhodalite.
(See individual listings). Garnets have a hardness that varies between
6-8 on the Mohs scale. It was believed that the wearer of garnets
was kept in good health and protected while traveling. Garnets are
worn to signify truth and faith. Red garnet is the birthstone for
Gaspeite is a pale green to apple-green semi-precious gemstone that
often has brown inclusions of its host rock. Gaspeite is translucent
to opaque. This beautiful stone has only recently been used in jewelry,
and is often set in silver. Gaspeite has a hardness of 4.5 - 5,
and a specific gravity of 3.7. Gaspeite is Nickel Magnesium Iron
Carbonate; its chemical formula is (Ni, Mg, Fe)CO3. This stone is
found in Gaspe Peninsula, Quebec, Canada (where it was originally
found and from which it derives its name) and Kambalda and Widgie
Mooltha, Western Australia, Australia
A precious or semiprecious stone that may be used as a jewel when
cut and polished. Include diamond, beryl, emerald, chalcedony, agate,
onyx, tourmaline, chrysolite, sapphire, ruby, spinel, topaz, turquoise,
zircon, cubic zirconia, jacinth, hyacinth, carbuncle, amethyst,
alexandrite, cat's eye, bloodstone, hematite, jasper, moonstone,
sunstone, and many others. Several organic materials like coral
and pearls are also considered gemstones.
Today, the common definition of a gemstone is any precious or semi-precious
stone, rock or mineral.
The explicit definition of a gemstone is a precious stone: diamond,
ruby, sapphire, emerald and precious opal.
Semiprecious stones are any other rocks, minerals, or petrified
material that is not classified as precious and which is used in
jewelry or collected. Some semi-precious stones include: agate,
topaz, carnelian, and jasper, lapis lazuli, jade and turquoise.
Unless the word "genuine" is included in the description
of a piece of jewelry, it could simply be using the term to describe
the color of the piece rather than its actual content. For example,
"gold" meaning gold toned, rather than actual gold. (See
below) Or "amethyst" meaning amethyst colored, rather
than containing an actual amethyst stone.
A smooth, round growth used as a gem, a "genuine" pearl
is one that formed naturally within the shell of a mollusk due to
an irritant rather than having the irritant placed into the mollusk
by hand or being made out of plastic.
A geode is a rock whose crystal-filled interior can be hollow or
filled. The crystals that form within the mineral crust of the geode
is called druze. From the outside, geodes look like rounded, but
otherwise ordinary rocks.
German silver (also know as nickel silver) is an alloy consisting
of mostly copper (roughly 60 percent), and approximately 20 percent
nickel, about 20 percent zinc, and sometimes about 5 percent tin
(then the alloy is called alpaca). There is no silver at all in
German silver. This alloy was invented around 1860 in Germany as
a silver substitute.
Gerry's is a mark of Gerry's Creations, Inc., a costume jewelry
company. Gerry's produced medium-quality to inexpensive jewelry,
including figural pins (often depicting cute animals).
GIA stands for the Gemological Institute of America.
An object decorated with a thin layer of gold, gold leaf or gold
A gimmel ring is a double ring that was designed during the Renaissance.
It consists of two or more interlocking rings. A gimmel ring symbolizes
the union of two people.
The gipsy setting is a recessed setting in which the stone is sunk
into the metal. There are often engraved designs around the stone
(especially star patterns). This type of setting was developed in
the late 1800's and was often used for rings. The gipsy setting
is also known as the "star setting."
A style of earring or brooch in which a large stone or decorative
element suspends three smaller pear-shaped pendants of similar design.
Girasol (which means sunflower in Spanish) is a yellow or orange
type of precious opal. Girasol is also known as hyacinth opal. In
girasol, the play of colors seems to come from within the stone,
like a floating light, and seems to follow the light source.
The outermost edge of a cut gem when viewed from the side and top.
It is the edge formed by where the top section (crown) and the bottom
section (pavilion) of the cut stone meet.
Givré beads are beads made of transparent glass fused around
a translucent core. Givré means frost in French.
Glass is often used in jewelry, as beads (faceted or spherical),
rhinestones and as poured glass.
Glass paste (also known as pate de verre) is glass that is ground
into a paste, put into a mold, and then melted. The final piece
is an opaque, dense glass with a frosted surface.
A glove ring is a clip-like device that is used to attach one's
gloves to a purse (or other object). The glove ring has a clip on
one end (for the gloves) and a chain with a clasp on the other end
(to attach the device to a purse handle).
(Also called "Beryllium") A rare silver-white metallic
element resembling magnesium. It is only found in nature combined
with other elements, usually silica or alumina, in the minerals
phenacite, chrysoberyl, beryl, euclase, and danalite.
Glyptography is the art of engraving gemstones, making intaglio
and cameos. Stones are engraved using grindstones with powdered
emory or diamond as an abrasive
A form of granite, but having the component materials, especially
the mica, arranged in planes so that it breaks rather easily into
coarse slabs or flags.
A yellow precious metal which is valued for its beauty and purity
since it does not oxidize or tarnish like most other metals. It
has been used for coins and jewelry for over 6000 years and from
this has become regarded as a symbol of wealth. Gold is very ductile
and is the most malleable of all metals. It can be cast into huge
statues or beaten into wafer thin sheets of gold leaf. This malleability
makes it too soft to be used in jewelry without being alloyed with
other metals. (See Karat).
Gold doré (pronounced gold doh-ray) is a bar of semi-purified
gold (e.g. bullion). After being mined, the first stage in the purification
process of the gold ore produces a cast bar (gold dore) that is
approximately 90% gold. The other 10% is mostly metals like silver
Process by which sheets of gold of at least 10 karats and no less
than seven-millionths of an inch thick are electro-chemically bonded
to another metal.
Goldette is the mark of the Circle Jewelry Products Company, New
York, New York, USA (owned by David Gartner). The Goldette mark
has been used since October, 1958. Goldette made good quality jewelry
often based on Victorian styles, featuring gold-tone metalwork,
intaglio, and/or enamelwork.
(Also "Goldfilled", or "gold-filled", abbreviated
g.f.) A piece of jewelry with a layer of gold mechanically applied
to the surface of a base metal, (like brass or copper), can be called
Gold Filled if the amount of gold equals one-twentieth of the total
weight of the piece. Victorian pieces are likely to be unmarked,
but later pieces are marked with the fineness of the gold layer,
and the part by weight of the gold. For example a piece marked "1/10
12K G.F." is composed of at least 1/10 12K gold based on the
weight of the finished piece. An older unmarked gold piece may often
be identified by wear through to base metal, especially when viewing
corners or edges under magnification. Look for a change to a darker,
brassy colored material at these spots.
Gold-plated metal has a very thin layer of gold on the surface,
usually applied by the process of electroplating. Pieces that are
gold plated are often marked G.E.P., gold electroplate, gold plated,
or electro-plaqué d'or.
Goldstone (also known as aventurine) is a shimmering quartz stone
that ranges in color from yellow to red to light green to light
brown. The shimmer is caused by tiny metallic particles (mica) within
the stone (not gold).
Jewelry finished with a gold color with almost no appreciable measurement
of weight in actual gold.
Products that have an extremely thin layer of gold, (less than .175
microns thick), applied by either dipping or burnishing the metal,
but not plated.. This will wear away more quickly than pieces that
are gold plated, gold-filled, or gold electroplated.
Jewelry finished so that it has the look of gold, but no actual
Stainless steel that has been electro-charged to resemble real yellow
A piece of jewelry in Good Condition will show substantial evidence
of wear. It will have a noticeable patina which may include numerous
very fine pits or lines. It will not have cracks, chips, obviously
discolored or poorly replaced stones, evidence of glue or other
repairs, or other evidence of hard wear considered to be damage.
Damage of any kind is separately detailed in the item description,
and generally items with damage appear at very reduced prices in
the Bargain section.
Goshenite is the pure, colorless form of beryl (Be3AlSiO6, related
to emerald and aquamarine). This hard, transparent gemstone is named
for the town of Goshen, Massachusetts, where it was first found.
Goshenite has been found in North and South America (especially
Colombia), Northern Europe, East Africa, South Africa, and the Himalayan
mountains in Asia. Goshenite has a hardness of 7.5 - 8.0 and a specific
gravity of 2.6 - 2.8. It is not enhanced. Goshenite is sometimes
coated with a green foil to resemble an emerald.
Jewelry that evokes the feeling of medieval Europe in its use of
styles, symbols, and motifs. It began in the 18th century as part
of the romantic movement.
The weight, in grams, of a specific metal used in a piece of jewelry.
A graduated necklace of beads or pearls has beads that go from a
small size in the back of the neck and gradually increase in size
to a maximum in the front of the necklace.
A grain is a unit of weight used for diamonds and natural pearls.
Four grains are equal to one carat
A common igneous rock composed of quartz, orthoclase, and hornblende,
often accompanied by pyroxene or mica. It is called granite because
of the granular surface. Granite is frequently used for buildings
A technique often used in Etruscan Revival jewelry, granulation
is the application of minute granules or grains of metal to the
surface of a piece of jewelry to form a decorative pattern.
Grape garnets are a rare, intense violet to purple-red garnet. Grape
garnets are made up of almandite and spessartite. They have a hardness
of 7-7.5 and a specific gravity of 3.8 - 3.9. Grape garnets are
found in the Orissa district of northwestern India.
Used to describe a gemstone's luster. Some gems which exhibit a
greasy luster are: nephrite jade, jadeite, soapstone, and talc.
A design motif attributed to the ancient Greeks symbolizing the
bonds of love, friendship and devotion. Greek key designs are repeating
patterns of interlocking geometric shapes.
Green diamonds are rare, fancy diamonds and are quite valuable.
Diamonds are precious, lustrous gemstones made of highly-compressed
carbon; they are one of the hardest materials known. Diamonds have
a hardness of 10, a specific gravity of 3.5, and a refractive index
of 2.417 - 2.419.
Green garnets are Demantoid garnets, a valuable green, and very
lustrous type of garnet. They are a rare variety of andradite. Demantoid
garnets have characteristic inclusions that look like horsetails.
Demantoid garnets has a hardness of 6-7 and a specific gravity of
3.8 - 3.9. Demantoids were very popular in the 1800's, but are rarely
An alloy made of gold mixed with copper, silver, zinc and often
cadmium. The copper is what gives it the greenish tinge. It is commonly
used with enameling to strengthen the color of the gold when set
beside the bright enamels.
Green rouge is chromium dioxide, which is used to polish precious
metals, giving them a luster.
Greenstone is another name for nephrite, a semi-precious stone and
a variety of jade. Nephrite is slightly softer that jadeite and
is often veined; it is used in carvings, for making beautiful bowls
Grelots are small beads that have an elongated, pendant shape.
Grey gold is gold that has been alloyed with 15-20% iron.
Griqualandite is tiger's eye from Griqualand, South Africa. It is
a yellowish-brown to reddish-brown gemstone that has a silky luster.
This gemstone has bands of yellow and brown; when viewed from the
opposite direction, the colors are reversed. Tiger's eye is usually
highly polished and set as a cabochon (or cut as a bead) to display
the stone's chatoyancy (light reflected in thin bands within the
stone). Tiger's eye is a type of chatoyant quartz with fibrous inclusions
(especially crocidolite). This stone is sometimes heat-treated.
Tiger's eye has a hardness of 7.0.
The channel routed in a line.
Grosse is a mark of the German jewelry company Henkel and Grosse.
Located in Pforzheim, Germany, this company has been in business
since 1938. Grosse has produced jewelry for Christian Dior since
1955. Grosse also produces jewelry for Burberry's. Later marks of
Grosse have an acute accent on the final e, Grossé.
Resembling a gooseberry, as with a grossular garnet, also called
Grossular garnet is a type of garnet, calcium-aluminum silicate.
Hessionite is a transparent brown, yellow, orange, or honey-colored
variety of grossular garnet often used in jewelry. The yellow variety
is called cinnamon stone, hyacinth or jacinth. Transvaal "jade"
is a type of green to gray grossular garnet from South Africa. Pink
grossular garnets varieties include landerite, rosolite, andXalostocite.
Tsavorite is an emerald-green grossular garnet. Grossular garnet
has a hardness of 6-7.5 and a specific gravity of 3.6.
A translucent garnet of a pale green color like that of the gooseberry,
occurring alone or as a constituent of the common garnet. It may
also be pink, brown, or black.
A style of enameling in which a continuous decoration is engraved
by an engine-turned lathe and then covered with translucent enamel
so that the engraving can be seen through the enamel.
Gunmetal is a metal alloy that is composed of 90 percent copper
and 10 percent tin.
Gutta percha is a resin from the Isonandra Gutta tree. Jewelry was
made from gutta percha in the mid-1800's. Gutta percha was also
used to insulate electrical cables. The Gutta percha company was
founded by Dr. Montgomerie in 1845 and was in business until 1930.
A soft, white mineral composed of hydrous sulfate of lime. It is
used as plaster of Paris.
A gypsy ring (also spelled gipsy) is a ring with a recessed stone
or stones. Also known as "star setting."
A setting in which the surface of the mount is virtually flush with
the top of the gemstone.