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Diamond[a] is a gemstone formed by cutting a raw diamond. Diamonds are one of the best-known and most sought-after gems, and they have been used as decorative items since ancient times. The hardness of diamond and its high dispersion of light —giving the diamond its characteristic "fire"—make it useful for industrial applications and ...
Gemstone diamond producers. Apollo Diamond (defunct, assets sold in 2011 to Scio Diamond) [1] ALTR Created Diamonds [2] De Beers (Lightbox) [3] Diamond Foundry [4] Gemesis (now a non-producing reseller called Pure Grown Diamonds) [5] Scio Diamond Technology Corporation [6] (colorless) Tairus [7] WD Lab Grown Diamonds [8]
In South American folklore, the carbuncle is a small elusive animal containing a mirror, shining gemstone or riches like gold. [4][5] The description of the carbuncle vary, some saying it looks like a firefly in the night, or like having a bivalve -like shell and maize ear shape. [4] According to the Book of Imaginary Beings "nobody ever saw it ...
An uncut/rough yellow sapphire found at the Spokane Sapphire Mine near Helena, Montana "Yogo sapphire" is the preferred term for gems found in the Yogo Gulch, whereas "Montana sapphire" generally refers to gems found in other Montana locations. [18] More gem-quality sapphires are produced in Montana than anywhere else in North America. [18]
This is a list of gemstones, organized by species and types. Minerals. There are over 300 types of minerals that have been used as gemstones. Such as: A–B
Hydrated silica. SiO 2 · n H 2 O. Opal is a hydrated amorphous form of silica (SiO 2 · n H 2 O); its water content may range from 3% to 21% by weight, but is usually between 6% and 10%. Due to its amorphous property, it is classified as a mineraloid, unlike crystalline forms of silica, which are considered minerals.
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