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Comprehensive
Dictionary Suite
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amazonite a moderately hard, green form of microcline, sometimes used as a gemstone.
azurite a semiprecious gemstone cut from this mineral. [1/2 definitions]
cabochon a polished gemstone, usu. in the form of a circle or ellipse, without facets. [1/2 definitions]
cameo a method of carving a gemstone so as to leave a slightly raised image of one color and a background of another. [1/3 definitions]
carbuncle a dark gemstone, esp. a ruby sapphire. [1/2 definitions]
carnelian a hard red or reddish brown semiprecious gemstone.
chrysolite a usu. magnesium-rich form of olivine, used as a gemstone.
emerald a gemstone of brilliant, transparent, dark green beryl. [1/2 definitions]
facet one of the small, flat, polished faces of a cut gemstone. [1/4 definitions]
jacinth a reddish orange zircon or similar mineral, used as a gemstone. [1/2 definitions]
jewel a cut and polished gemstone, or an ornament made with gems and other costly material. [1/5 definitions]
rhodolite a pink, rose-red, or reddish violet variety of garnet, used as a gemstone.
rose quartz a pink or rose-colored variety of quartz, used as a gemstone.
ruby a deep red gemstone, or something made of this stone. [2/4 definitions]
sapphire a precious gemstone that is usu. deep blue. [1/2 definitions]
sard a hard orange or brownish red chalcedony, used as a gemstone.
sardonyx an onyx in which bands of sard alternate with a white chalcedony, used as a gemstone in cameos and the like.
tiger's-eye a semiprecious, golden brown gemstone of changeable luster, composed of quartz tinted by iron oxide, used for jewelry.
topaz a precious gemstone occurring in various colors, esp. yellow and brown. [1/2 definitions]
tourmaline a complex silicate mineral containing several elements, most importantly boron and aluminum, used in electronic instruments and, in its colorful and transparent varieties, as a gemstone.
truncate to cut off a point or edge of (a gemstone) to create a new facet. [1/4 definitions]