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Glittering Stones >> Semi
Precious Stones >> Agate
Semi Precious Stone Agate
Agate is the term applied not to a distinct mineral species,
but also to an aggregate of various forms of silica, chiefly Chalcedony.
According to Theophrastus the agate was named from the
river Achates, in Sicily, where
these gem
stones were first found.
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Historical Facts of Agate
Refractive Index |
1.530 - 1.539 |
Chemical Composition |
Hardness |
Density |
2.57 - 2.64 |
Crystal Group |
Hexagonal |
Ocurrence |
Scotland, U.S.A., India, England, Italy, Brazil, Uruguay, Germany, Egypt, Indonesia, and many other localities |
Color Key |
Blue, yellow, green, yellow, orange, brown, gray |
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Gem Jewelry Agate
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