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PhotosPitchblende - McKinney Mine, Spruce Pine, Spruce Pine District, Mitchell Co., North Carolina, USA

22nd Feb 2012 02:14 UTCMichael Jacob

07578370014977322556365.jpg
Pitchblende, Mica Group, Quartz, Calcite
McKinney Mine (Power Mill Creek Mine), Spruce Pine, Mitchell County, North Carolina, USA
Copyright © Logan Babcock (2)
Hi! The old label had the ID for pitchblende from Spruce Pine. Its really hot--pegs my meter on the highest setting. Any simple test to make sure it isn't polycrase? Thanks--please reply to my email if possible.. MJ

22nd Feb 2012 03:07 UTCFred E. Davis

Probably the most significant factor that it's uraninite is that polycrase has not been reported from McKinney mine. Your description of the relative radioactivity would also suggest uraninite which exhibits about 10 times the activity of polycrase. You could also check the density since uraninite is more dense than polycrase.

22nd Feb 2012 03:16 UTCAlfredo Petrov Manager

Another test you could do would be for possible density change after heating.

25th Feb 2012 15:55 UTCReiner Mielke Expert

Uraninite is soluble in Nitric Acid, Polycrase is not.
 
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