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Rough Gemstones
Name: Chalcedony
Color: Bluish, white gray gold-brown, iridescent Hardness: 6 1/2 - 7
Density: 2.58 2.64
Transparency: Dull, Translucent Country: Belize, Denmark, Eritrea, Greenland, India
Shri Ashtapad Maha Tirth
Traditionally defined as a fibrous cryptocrystalline variety of Quartz, more recently, it has been shown that much Chalcedony is a mixture of Quartz and Morganite, silica mineral. When it is concentrically banded (often in rather wild patterns) it is called by the sub variety name Agate. When it is in flat layers/bands it is called by the sub variety name Onyx
Name: Sodalite
Color: White, blue, gray
Hardness: 5 1/2-6
Density: 2.14-2.40
Transparency: Transparent to Opaque
Country: Brazil, Greenland,
India, Canada, Namibia. Russia and U.S.A.
SILICATES (Tectosilicates, Sodalite Group) Na4Al(SiO4)3CI (Sodium aluminum silicate chloride) The name sodalite refers to its sodium content. For jewelry, only blue tones are used sometimes they have a violet tint; frequently they are dispersed with white veins from white calcite.
Name: Jasper
Color: All colors, mostly spotted or striped Hardness: 6 1/2-7
Density: 2.582.91
Transparency: Opaque, even in thin slabs
Country: Egypt, Australia, Brazil, India, Canada, Kazakhstan, Madagascar, Russia
Uniformly colored jasper is rare. Usually it is multicolored, striped or flamed. Sometimes jasper is grown together with agate or opal.
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Ratna Mandir
