Ammolite is a recently recognized gemstone mineral that has its origin in fossilized ancient sea creature shells. These fossils were compressed in specific sheet formations in the socalled Bearpaw shale of North America. The mineral is iridescent with multi-colored facets creating a stain glass appearance. Ammolite is often cut with the backing of the fossil shell very thin. Ammolite is sometimes called ammonite which refers to the marine mollusks fossilized from the cretaceous period. The gemstone quality variety is found mainly in Alberta Canada region, recognized in 1981 by the World Jewelry Confederation..
Chemical Formula CaCO3
Color Orange, Blue, Red, Green, Yellow, Gold, Multicolored
Hardness 3.5 Â -Â 5.5
Crystal System Amorphous, orthorhombic
Refractive Index 1.520 Â -Â 1.670
SG 2.60 Â -Â 2.85
Transparency Opaque with thin colored translucent sheets
Double Refraction 1.5
Luster Vitreous to Resinous
Cleavage None
Mineral Class Carbonate
Chemical Formula CaCO3
Color Orange, Blue, Red, Green, Yellow, Gold, Multicolored
Hardness 3.5 Â -Â 5.5
Crystal System Amorphous, orthorhombic
Refractive Index 1.520 Â -Â 1.670
SG 2.60 Â -Â 2.85
Transparency Opaque with thin colored translucent sheets
Double Refraction 1.5
Luster Vitreous to Resinous
Cleavage None
Mineral Class Carbonate
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