SAWN BASTNASITE-(Ce) PSUEDO AFTER ALLANITE-(Ce) OREGON #2 MINE, COLORADO, RARE!!

SAWN BASTNASITE-(Ce) PSUEDO AFTER ALLANITE-(Ce) OREGON #2 MINE, COLORADO, RARE!! (image 1/3)
SAWN BASTNASITE-(Ce) PSUEDO AFTER ALLANITE-(Ce) OREGON #2 MINE, COLORADO, RARE!! (image 2/3)
SAWN BASTNASITE-(Ce) PSUEDO AFTER ALLANITE-(Ce) OREGON #2 MINE, COLORADO, RARE!! (image 3/3)
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For your consideration is this very unusual specimen of red Bastnasite-(Ce) replacing Allanite-(Ce) from the Oregon #2 Pegmatite, South Platte District, Jefferson County, Colorado. A great specimen from this locality which has been cut on one side as seen to show the fascinating psuedomorphism process in which a 'core' of fairly unaltered Allanite progressively alters to a 'rind' of red bastnasite. Measures ~10,000 CPM on my Ludlum Model 3 Counter with the 44-9 Probe, due to trace U/Th. Very Rare!! Specimen Dimensions: 8 x 5 x 5 cm. Weight: 331 grams.
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