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Mica is heat-resistant and does not conduct electricity
It also serves as the Mohs hardness scale index mineral for a hardness of 8
This makes sapphires very durable and scratch-resistant
as well as drawing energies from its less dominant colors
it lightens because of further weathering and becomes Malachite
River Stone 5x8mm Rondelle - Large Hole Beads 170 Mica is heat-resistant and doesRiver Stone is a form of limestone composed of quartz, calcium carbonate and other materials. Naturally beautiful, it offers a way to work a neutral color into your designs. This stone is relatively soft, according to the Mohs hardness scale, so treat it gently.
