Glittering Stones >> Semi Precious Stones >> Calcite

Semi Precious Stone Calcite

Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). The other polymorphs in calcite are the minerals aragonite and vaterite. The aragonite will change to calcite at 470°C, and vaterite is even less stable.

Calcite seas existed in Earth history when the primary inorganic precipitate of calcium carbonate in marine waters was low-magnesium calcite that opposed to the aragonite and high-magnesium calcite precipitated.

The mineral Calcite primarily often constituent of the shells of marine organisms, e.g., plankton (such as coccoliths and planktic foraminifera), the hard parts of red algae, some sponges, brachiopoda, echinoderms, most bryozoa, and parts of the shells of some bivalves, such as oysters and rudists).

Calcite
Historical Facts of Ammolite
Refractive Index 1.640 - 1.660, 1.486
Chemical Composition CaCO3
Hardness 3
Density 2.71
Crystal Group Trigonal Hexagonal Scalenohedral
Luster Vitreous
Occurrence New Mexico
Color Colorless, White, Gray, Yellow, Green, Pink

Gem Jewelry Bloodstone
Calcite Bracelet
Calcite Bracelet
Calcite Earrings
Calcite Earrings
Calcite Necklace
Calcite Necklace
Calcite Rings
Calcite Ring

 

   
 
 
 
 
 
 
 
 

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