Kobokite
Image: DerHexer (CC BY-SA 3.0)
Mineral NameKobokite
Chemical FormulaCa₄(PO₄)₂F₂·10H₂O
Mohs Hardness3
Crystal Systemmonoclinic
Lustervitreous
Streak Colorwhite
Cleavagegood on {010}
Fractureuneven
Specific Gravity2.5
Colorslight blue, blue, colorless, white, pale green
Transparencytransparent to translucent
Type LocalityPoland
Mineral GroupPhosphates
Usescollector
Associated Mineralsquartz, feldspar, other phosphates
Rarityuncommon
Description
A specimen displaying radiating clusters of light blue, acicular to prismatic crystals growing on a dark matrix.
Geological Context
Kobokite is a secondary mineral typically found in pegmatites or hydrothermal veins, often forming from the alteration of other phosphate minerals.
