This is the transparent blue apatite earrings. Dimensions: 0.7 x 0.5 x 0.2″ (1.8 x 1.3 x 0.5cm). Total weight – 0.2oz (6 grams). Origin: Russia, Siberia.
Some information about apatite:
Apatite is a group of phosphate minerals, usually referring to hydroxylapatite, fluorapatite and chlorapatite, named for high concentrations of OH, F and Cl ions, respectively, in the crystal.
Apatite is one of a few minerals produced and used by biological micro-environmental systems. Apatite is the defining mineral for 5 on the Mohs scale. Hydroxyapatite, also known as hydroxylapatite, is the major component of tooth enamel and bone mineral. A relatively rare form of apatite in which most of the OH groups are absent and containing many carbonate and acid phosphate substitutions is a large component of bone material.
The primary use of apatite is in the manufacture of fertilizer. Used as a gemstone. Green and blue varieties in finely divided form, are pigments with excellent covering power.