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Mushroom Rhyolite is named for the naturally occurring stone pattern which often resembles mushrooms or other fungi
Denim Lapis has the brilliant blue and gold of higher end Lapis
mineral deposits can create stone in the place of the decaying wood
composed of hard calcium carbonate
Like all obsidian
Smoky Quartz 10mm Round - 15-16 Inch 12x18-17x30mm Mushroom Rhyolite is named forSmoky Quartz is a translucent smoky brown or gray variety of Quartz. It ranges from almost completely transparent to an almost opaque brownish to gray crystal. The color of Smoky Quartz is due to natural irradiation and traces of aluminum within the crystal lattice of the stone. Smoky Quartz it the national gem of Scotland, where it was mined since around 300 BCE.