Pyrrhotite
Pyrrhotite is a sulfide mineral known for its striking metallic crystals, with known Chinese sources.
About Pyrrhotite
Pyrrhotite is classified as a sulfide mineral in the pyrrhotite group and has the chemical formula Fe(1-x)S (x = 0–0.2; iron-deficient). It crystallizes in the hexagonal system and is relatively soft, requiring careful handling.
Identification & care
Pyrrhotite typically forms tabular, platy crystals; massive; granular; rosette aggregates ('iron rose'). Its color is typically bronze-yellow, reddish bronze and yellowish (tarnishes dark brown). The luster is metallic, bronze, the streak is dark grayish black, and specimens are typically opaque. The cleavage is imperfect on {0001}. The fracture is subconchoidal to uneven, which aids identification.
Collector context
Collector notes
Among systematic collectors of sulfides and native metals, Pyrrhotite is a recognized reference species. Pyrrhotite is widely represented across Chinese provinces, including Fujian, Gansu, Anhui, Guangdong.