Acanthite
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Acanthite (black needles) on Silver, Trevassack Quarry, Lizard, Cornwall, England Field of view 4mm

Acanthite (black needles) on Silver, Red Gill Mine, Caldbeck Fells, Cumberland, England Field of view 3mm
Red Gill Mine, Caldbeck Fells, Cumberland, England 

 
Trevassack Quarry, Lizard, Cornwall, England


Crown Point Mine,Boise, Idaho, USA  
Crown Point Mine,Boise, Idaho, USA Crystal Size 0.5mm
Crown Point Mine,Boise, Idaho, USA Crystal Size 0.5mm