Thread: Tom Stern's natural pearls
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Old 08-07-2008, 04:34 PM
smetzler smetzler is offline
Second-graft Pearl
Senior Guide Member
  
Join Date: Jan 2007
Location: Seattle, WA
Posts: 617
Thanks so much…that agate is truly amazing.

Brings us all the way back to non-nacreous calcareous concretions, in which iridescence ('orient') is an impossibility—pending discovery of an image to the contrary!
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