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topaz cluster (druze)

On a trip to Paraguay I purchased a cluster of crystals which the seller claimed was topaz. The cluster is 14 pounds. I recently tested it with a presidium thermal radiation tester (heat dispersion) and it tested as topaz. The individual crystals are up to aprox. 10mm. I have looked everywhere for info on this type of crystal formation and found nothing. Can someone help me with this ? The cluster looks like it was exposed to running water and has rounded spots but the the crystals not exoposed to this wear are perfect. The crystals are white to yellow color with very little gem quality. Is this rare or just a common cluster?

From Hector W. Colon - April 04, 2012 at 03:42:39
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Message: 70288



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