#transparent_gem a gemstone having the property of transmitting light without serious diffusion
supertype: gemstone__gem__stone a crystalline rock that can be cut and polished for jewelry
subtype: garnet any of a group of hard glassy minerals (silicates of various metals) used as gemstones and as an abrasive
subtype: almandite__almandine a deep red garnet consisting of iron aluminum silicate
subtype: andradite a garnet consisting of calcium iron silicate and having any color ranging from yellow and green to brown and black; used as gemstone
subtype: demantoid a green andradite used as a gemstone
subtype: carbuncle.garnet deep-red cabochon-cut garnet cut without facets
subtype: cinnamon_stone__essonite__hessonite a garnet ranging in color from yellow to brown
subtype: pyrope a deep red garnet used as a gemstone
subtype: rhodolite a red or pink variety of garnet used as a gemstone
subtype: amethyst a transparent purple variety of quartz; used as a gemstone
subtype: aquamarine a transparent variety of beryl that is blue green in color
subtype: chalcedony__calcedony a milky or grayish translucent to transparent quartz
subtype: agate an impure form of quartz consisting of banded chalcedony; used as a gemstone and for making mortars and pestles
subtype: moss_agate an agate with brown, black, or green moss-like markings
subtype: bloodstone__heliotrope green chalcedony with red spots that resemble blood
subtype: carnelian__cornelian a translucent red or orange variety of chalcedony
subtype: chrysoprase a green variety of chalcedony valued as a gemstone
subtype: onyx a chalcedony with alternating black and white bands; used in making cameos
subtype: sardonyx an onyx characterized by parallel layers of sard and a different colored mineral
subtype: plasma.chalcedony a green slightly translucent variety of chalcedony used as a gemstone
subtype: sard__sardine__sardiu a deep orange-red variety of chalcedony
subtype: chrysolite a brown or yellow-green olivine found in igneous and metamorphic rocks and used as a gemstone
subtype: peridot a pale green variety of chrysolite; used as a gemstone
subtype: chrysoprase a green variety of chalcedony valued as a gemstone
subtype: citrine semiprecious yellow quartz resembling topaz
subtype: adamant__diamond very hard native crystalline carbon valued as a gem
subtype: black_diamond__blackdiamond__carbonado an inferior dark diamond used in industry for drilling and polishing
subtype: emerald.beryl a green transparent form of beryl; highly valued as a gemstone
subtype: kunzite a pinkish lilac crystal form of the mineral spodumene that is used as a gemstone
subtype: moonstone a transparent or translucent gemstone with a pearly luster; some specimens are orthoclase feldspar and others are plagioclase feldspar
subtype: morganite a kind of pink beryl used as a gemstone
subtype: peridot a pale green variety of chrysolite; used as a gemstone
subtype: ruby.corundom a transparent deep red variety of corundum; used as a gemstone and in lasers
subtype: water_sapphire__watersapphire a deep blue cordierite often used as a gemstone
subtype: sapphire.corundom a precious transparent stone of rich blue corundum valued as a gemstone
subtype: star_sapphire a sapphire that when cut shows a star-like figure in reflected light because of its crystalline structure
subtype: hiddenite a green transparent form of the mineral spodumene used as a gemstone
subtype: sunstone__aventurine a translucent quartz spangled with bits of mica or other minerals
subtype: goldstone aventurine spangled densely with fine gold-colored particles
subtype: topaz a mineral (fluosilicate of aluminum) that occurs in crystals of various colors and is used as a gemstone
subtype: tourmaline a mineral that is a complex borosilicate and hydroxide of aluminum containing iron and magnesium and calcium and lithium and sodium; it is usually black but occurs in transparent colored forms that are used as gemstones
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