Mineralpedia Details for Ramdohrite
Name to honor German mineralogist Professor Paul Ramdohr of the University of Berlin who did extensive research on opaque ore minerals. At its type locality at Chocaya mine in Bolivia, Ramdohrite occurs in a vein of fine grained quartz likely of hydrothermal origin. Ramdohrite can also be found in the USA, Slovakia, China, Russia and other localities in association with pyrite, stannite, andorite, jamesonite, sphalerite, and quartz.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/ramdohrite.pdf
Ramdohrite from Chocaya mine, Atocha-Quechisla dist., Potosí dept., Bolivia
Dull black thin platy or "lance-shaped" crystals to 1mm in rosettes and balls. This used to ba called Andorite VI and is much like a cadmium-rich Fizelyite.