A classic example of this old, antique material, much of which is truly ancient although some was found by intrepid collectors in the 1960s-70s as well. Such crystals are few and far between today. This was a prized miniature in the collection of aesthetic Scottish classics of Tim Sherburn of Vista, CA. For more info, see MINDAT: https://www.mindat.org/loc-2892.html. Those who know, know. This is good, rare, and really in good shape for such a piece.
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