Home > Laskowski Ⅴ – July 20 > MS1899 Franckeite
Franckeite
- San José mine
- Oruro
- Oruro Department
- Bolivia
- 6.5 × 5.9 × 2.5 cm – Small cabinet specimen (under 10 cm)
Franckeite is a lead tin iron antimony sulfide. Stelzner (1893) named the mineral after brothers Carl (1832-1907) and Ernst Francke (1838-1913), both German mining engineers, who worked in Bolivia and provided the original material.
Franckeite forms bladed, foliated crystals in radiating groups with minor pyrite and zinkenite. From the collection of E.R. Laskowski (1949-2020), a mining engineer who retired to Tucson, Arizona.
Price: $450
Item code: MS1899
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