Gejiu Mine
Gejiu (个旧) in Yunnan is historically known as the "Tin Capital of the World," one of the largest tin-polymetallic districts on Earth. It produces cassiterite, fluorite, calcite, and a suite of sulfide and arsenide minerals.
About Gejiu Mineextended article
The "Tin Capital of the World"
The Gejiu district in southeastern Yunnan is one of the world's largest tin-producing areas, with a mining history reaching back more than two thousand years. The deposits are tin-polymetallic (Sn–Cu–Pb–Zn), formed where granitic intrusions meet carbonate host rocks, producing skarn and replacement ore bodies.
What Gejiu is known for
- Cassiterite — the primary tin ore, in collectable crystals
- Purple and green fluorite
- Calcite, arsenopyrite, pyrrhotite, and löllingite
- Datolite and other skarn-associated species
Collector value
Sharp cassiterite crystals, saturated fluorite, and well-formed calcite are the value drivers. As with most long-worked Chinese districts, fine crystallised specimens from the classic pockets are increasingly difficult to source at original quality.