Description
Obsidian – Rainbow Tumbled Stone
Rainbow Obsidian has an amorphous crystal system and is in the mineral class of oxides. It is formed volcanically when lava that is rich in silicic acids cools very quickly. The result of this creates a mass that is very rich in minerals, water and gas inclusions.
Its basic color is black. There is a colorful iridescence that is hard to capture in a photograph. The rainbow colors swirled through it come from finely distributed water bubbles (much the same as rainbows found in clear quartz). Lower or higher concentrations of minerals provides us Obsidian’s other varieties.
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