Hackmanite Crystal Specimen in Pottle Black Friday Spheres formed about 28-29 million years

formed about 28-29 million years ago from the intense heat of a powerful

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A collection of fossilised Orthoceras shells in a single piece of polished limestone formed into a standing sculpture

Base Color: Clear

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Hackmanite Crystal Specimen in Pottle Black Friday Spheres formed about 28-29 million yearsHackmanite is a rare, sulfur rich variety of the mineral Sodalite, celebrated by mineralogists and gem collectors for its mesmerizing optical properties. Hackmanite exhibits Tenebrescence: "reversible photochromism." When exposed to UV light, pale stones (usually white, gray, or pink) rapidly darken to deep pink, violet, or purple. When stored in the dark or exposed to white LED light, the original color returns. These crystals comes in a protective