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But unfortunately
Discover the beauty of nature with our Guerrero Amethyst Specimen from Mexico
Large gray spherical concretion with one side exposed to reveal the internal shrinkage fractures that are lined with iridescent Pyrite microcrystals
5" Tall x 3in Long x 2
Weight: 1066g
Thomsonite Specimen, India ankh But unfortunatelyThomsonite, named after prominent chemist Thomas Thomson, is a well named mineral belonging to the zeolite group. Primarily composed of hydrated calcium silicate, it may have minor amounts of sodium and traces of potassium, but lacks barium, strontium, iron, and magnesium. Structurally, it is similar to sodium calcium zeolite mesolite and sodium zeolite natrolite, but does not form a continuous chemical series with either. It can be found in a range
