Jamesonite
Jamesonite is a sulfosalt mineral known for its striking metallic crystals, with known Chinese sources.
About Jamesonite
Jamesonite is classified as a sulfosalt mineral in the jamesonite group and has the chemical formula Pb4FeSb6S14. It crystallizes in the monoclinic system and is relatively soft, requiring careful handling.
Identification & care
Jamesonite typically forms acicular, fibrous, plumose ('feather ore'); massive. Its color is typically steel gray to lead gray. The luster is metallic, the streak is gray-black, and specimens are typically opaque. The cleavage is perfect {001}. The fracture is uneven, which aids identification.
Collector context
Collector notes
In the metallic-crystal category, Jamesonite is a consistent target for serious collectors. Jamesonite is widely represented across Chinese provinces, including Gansu, Anhui, Guizhou, Guangdong.