David K. Joyce

Bolivian Minerals -Franckeite, Potosiite

Franckeite occurs in several places in the world but one of the best places for well formed crystals is Bolivia, partiticularly the San Jose Mine, Oruro. Here are some excellent examples! Some of them have the variety of franckeite -potosiite on them. Apparently, potosiite is a Sb deficient variety of franckeite but the crystal habit and formulae are so different, I'm not sure why! Here are excellent examples of both!

All prices in Canadian dollars. For payment in US$, deduct 18% or multiply by 0.82.

Click on any of the following thumbnails to view a larger image of the specimen.

Potosiite, FranckeiteBolivian Minerals -Franckeite, Potosiite
  • Item #17601
  • Potosiite, Franckeite
  • 5.2x3.9x4.0 cm
  • Largest Crystal Size: 3mm
  • $75.00
  • San Jose Mine
  • Oruro, Cerrada, Oruro
  • Lots of rounded, elongated potosiite crystals intermixed with regular, pointy franckeite crystals. Excellent!
Potosiite, (Var. Franckeite)Bolivian Minerals -Franckeite, Potosiite
  • Item #17595
  • Potosiite, (Var. Franckeite)
  • 3.9x3.3x2.3 cm
  • Largest Crystal Size: 1.5mm
  • $65.00
  • San Jose Mine
  • Oruro
  • Mounds of pointy, classic franckeite crystals. From one of the localities that produces the best specimens.