20hhgd.is (STURMANITE TYPE LOCALITY, MANGANITE)), $50 MINIMUM BID, Black Rock Mine, Black Rock, KMF, Northern Cape, South Africa, 1.3 x .5 x .5 cm, Thumbnail | |
Brown Sturmanite crystals and black lustrous Manganite crystals. Sturmanite is common from N'Chwaning and even some from Wessels, but Black Rock seems to be a rare occurance with no photos on mindat.org. 10 pages with the majority from N'Chwaning and a few Wessels. No Black Rock! ex Glenn Davidson collection |