脆硫銻鉛礦

Jamesonite is a lead-iron-antimony sulfosalt that crystallizes as fine, hair-thin acicular needles, sometimes forming felted matted masses (“feather ore”). It is one of the few common sulfides that exhibits genuine fibrous habit.

Occurrence in China

Jamesonite is the signature collector species of the Yaogangxian mine, Hunan alongside bournonite, where lustrous black needle bundles up to 10 cm long are produced. Wuzhou (Guangxi) and various Yunnan Pb-Zn-Sb mines produce additional material. Cornwall (UK) and Bolivia also yield notable specimens.

Identification

Hair-fine acicular metallic needles + hexagonal cross-section + Pb-Sb mining association. Distinguish from boulangerite (similar habit but typically thicker and more lustrous) by chemistry — only chemical analysis is fully decisive.

Collector Notes

Yaogangxian “feather ore” jamesonite needles standing on quartz drusy or arsenopyrite are among the most dramatic Chinese sulfide specimens. Care: fragile.