|AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Czech Republic > Polybasite-M2a2b2c
|Joseph Mine, Jáchymov (formerly Joachimsthal), Bohemia, Czech Republic
|Sparkling microcrystals of black polybasite on milky quartz crystal to 1 mm with earthy brown coating. Some professionals consider Jáchymov to be the Type locality for the M2a2b2c polytype.
|For reference only
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