Stones of Portugal Episode-2
Sammy Chris
Specimens produced in Iberian Peninsula- Fluorapatite, Ferberite, Pyrite, and Marcasite Fluorapatite is a phosphate mineral with the formula Ca5(PO4)3F (calcium fluorophosphate). Fluorapatite is a hard crystalline solid. Although samples can have various colours (green, brown, blue, yellow, violet, or colourless), the pure mineral is colourless, as expected for a material...