Gemstone Chart (A Searchable Collection of Precious/Semi-precious Stone Information)
This is
a searchable collection of international precious stone/gem. With its sparkle and color, a gem can mystify and intrigue people. Most gemstone buyers purchase gems for making jewelry. But some buyers are gemstone collectors. The chart is resource for your
gemstone buying and collecting.
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| Gemstone Chart |
 Natural Topaz
Topaz is a silicate mineral most often found in igneous rocks of felsic composition. It is a common gemstone that has been used for centuries in jewelry. Gem quality topaz most commonly occurs in nature as a colorless crystal. It is a very popular gemstone.
Color: colorless, blue, yellow-brown, pinkish orange, red-orange, red-brown, tan.
Categories: semi-precious stone
Chemical Composition: AL(F,OH)2SIO4
Crystal Group: Orthorhombic
Refractive Index: 1.629 - 1.637
Hardness: 8
Density: 3.52 - 3.56
Occurrence: Brazil, Sri Lanka, Nigeria, Germany, Australia, Japan, Russia, Ireland, Zimbabwe.
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Related Link: Gold Coins Chart Gold Bars Chart Diamond Size Chart Necklace Size Chart Ring Size Chart Ear Gauge Size Chart |
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Top Use:  Gemstone Chart Color:brown
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- 5/1/2025 19:59Gemstone Chart Color:-7620'/**/UNION/**/ALL/**/SELECT/**/NULL,NULL,CONCAT(0x716a7a6271,0x43495a776c4f504556705051526e53486151716c7441794d556e6c676459564a5162576c4e694e49,0x716a707171),NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL--/**/-
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