Torbernite
Torbernite is a phosphate mineral recognized among collectors for its crystal form and distribution, with known Chinese sources.
About Torbernite
Torbernite is classified as a phosphate mineral in the autunite group and has the chemical formula Cu(UO2)2(PO4)2·12H2O. It crystallizes in the tetragonal system and is relatively soft, requiring careful handling.
Identification & care
Specimens usually show tabular, square, micaceous; fan-like aggregates. Its color is typically emerald green, grass green and apple green. The luster is vitreous to pearly, the streak is pale green, and specimens range from transparent to translucent. The cleavage is perfect {001} — micaceous. The fracture is uneven, which aids identification.
Collector context
Collector notes
Among collectors of crystallized species, Torbernite is a recognized reference. Torbernite is widely represented across Chinese provinces, including Gansu, Anhui, Guizhou, Guangdong.