Scorzalite: Gemstones Information
Scorzalite is (Fe2,Mg)Al2(PO4)2(OH)2 forming a series to lazulite (q.v.) and occurs as semitransparent dark blue masses in the monoclinic system with hardness 6 and SG 3.32. The RI for the alpha, beta and gamma rays is 1.626–1.645, 1.654–1.674, 1.663–1.680, biaxial negative with birefringence near 0.040. Scorzalite occurs as a secondary mineral in complex-zoned granite pegmatites. Gem specimens most likely to be from Brazil, perhaps from the Corrego Frio pegmatite, Divino das Laranjeiras, Linopolis, Minas Gerais.