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WebAug 30, 2024 · New colors are so bright and vivid that it is hard to say they are natural. But it is. The most common minerals and rocks that glow under UV light are fluorite, calcite, aragonite, opal, apatite, chalcedony, corundum (ruby and sapphire), scheelite, selenite, smithsonite, sphalerite, sodalite. Some of them can glow a particular color, but others ... WebJul 5, 2024 · Ammolite is an iridescence gemstone, one of the few natural stones with a rainbow of colors. It has a three-layered structure, with the base consisting of a dark grey … WebDec 13, 2024 · Black obsidian is a natural old-world stone that humans have been utilizing since the dawn of time! The smoky color and glass-like finish are a product of the powers … doi 10.1136/bmj.h4520