David K. Joyce Minerals

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 19% or multiply by 0.81.

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
    Bolivia
  • Lots of rounded, elongated potosiite crystals intermixed with regular, pointy franckeite crystals. Excellent!
Potosiite, FranckeiteBolivian Minerals -Franckeite, Potosiite
  • Item #17603
  • Potosiite, Franckeite
  • 4.8x3.6x1.6 cm
  • Largest Crystal Size: 2mm
  • $65.00
  • San Jose Mine
  • Oruro, Cerrada, Oruro
    Bolivia
  • This piece is covered top and bottom with sharp, pointy franckeite crystals and the curious, rounded, elongated potosiite crystals scattered amongst them. Nice!
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
    Bolivia
  • Mounds of pointy, classic franckeite crystals. From one of the localities that produces the best specimens.
Potosiite, (Var. of Franckeite)Bolivian Minerals -Franckeite, Potosiite
  • Item #17599
  • Potosiite, (Var. of Franckeite)
  • 4.5x4.4x1.7 cm
  • Largest Crystal Size: 3mm
  • $75.00
  • San Jose Mine
  • Oruro, Cerrada, Oruro
    Bolivia
  • Really nice potosiite crystals are scattered here and there amongst the more pointy, wavy franckeite crystals. Very nice!
Potosiite, (Var. of Franckeite)Bolivian Minerals -Franckeite, Potosiite
  • Item #17598
  • Potosiite, (Var. of Franckeite)
  • 4.4x3.5x1.9 cm
  • Largest Crystal Size: 3mm
  • $110.00
  • San Jose Mine
  • Oruro, Cerrada, Oruro
    Bolivia
  • This specimen has a number of spectacular potosiite crystals on it. The potosite crystals are scattered amongst the more common pointy franckeite crystals. Superb!