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Thulite Ring Size 8
Siberia remains the primary source of this unique mineral
Weight: 44 grams
The structures were empty tubes
357g Optical Calcite Freeform TC2009 ruby zoisite Thulite Ring Size 8357g Optical Calcite Freeform Approx. Dimensions: 2. 5x2x2. 5 inches Approx. Weight: 357 grams Locality: Maharashtra, India Optical calcite is also referred to as Iceland Spar because of its first discovery in Eskifjord, Iceland. It is typically colorless, and exhibits the optical phenomenon of double refraction where an object viewed through the calcite will appear doubled. Double refraction, or birefraction, is also called birefringence and is also
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