Variscite
Variscite is a term used to describe a type of mineral that belongs to the group of aluminum phosphate minerals. It is characterized by...
Turquoise
Turquoise is a
member of phosphate mineral with chemical the formula CuAl6 (PO4)4(OH) 8·4H2O.
Turquoise is an opaque, blue-to-green mineral that is a hydrated phosphate of
copper...
Autunite
Autunite is a phosphate mineral that formula is calcium uranium phosphate (Ca (UO2)2(PO4)2·10–12H2O) and It is harness of 2 - 2, 5.A popular collector’s...
Apatite
Apatite is a very common mineral, but transparent gemstone-quality apatite is extremely rare. Despite the fact that apatite is the defining mineral for 5 on Mohs scale of hardness, the gemstone remains virtually unknown to most, and is seldom found in jewelry stores.