Obsidian is natural glass, formed when lava from volcanoes cooled very quickly. These obsidians contain natural iridescent colors that flash and shine when the stone is moved in the light. They are the result of the “depositional banding” or layering of various types of microscopic feldspar or mica crystals lined up just right within the glass. In dim light, these stones appear black, but in stronger lights, they just shine. Adding to their interest is the wonderful carving, done by artisans in Jalisco, Mexico, where the stone is mined. The combination of color patterns and individual carving makes each stone unique. In one position, the stone is black. Turn it slightly, and the rainbows burst forth.
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