APATITE CRYSTAL MATRIX
Cute little APATITE CRYSTAL MATRIX for your collection. Glossy looking crystals on orange calcite matrix.
Lake Baikal, Russia.
6.3cm x 5cm x 5.6cm, 208g.
Crystal measures cm across flats.
Apatite: Ca5(PO4)3(OH,F,Cl), Calcium (Fluoro, Chloro, Hydroxyl) Phosphate.
Apatite is actually three different minerals depending on the predominance of either fluorine, chlorine or the hydroxyl group. These ions can freely substitute in the crystal lattice and all three are usually present in every specimen although some specimens have been close to 100% in one or the other. The rather non-inventive names of these minerals are Fluorapatite, Chlorapatite and Hydroxylapatite. The three are usually considered together due to the difficulty in distinguishing them in hand samples using ordinary methods.
An irony of the name apatite is that apatite is the mineral that makes up the teeth in all vertebrate animals as well as their bones. Get it? Apatite – teeth, anyway, the name apatite comes from a Greek word meaning to deceive in allusion to its similarity to other more valuable minerals such as olivine, Peridot and Beryl