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with a very sharp
Natrolite Geode
Acrylic stand not included
light blue
5 x 2 inchesApprox
84g Optical Calcite Freeform TC2115 durga with a very sharp84g Optical Calcite Freeform Approx. Dimensions: 1. 25x1. 25x1. 75 inches Approx. Weight: 84 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
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