Smoky Quartz 10x14mm Barrel - Large Hole Beads 20x40mm It is opaque and occurs

It is opaque and occurs in a wide variety of colors

It is often used in kiln furniture and foundry molds

Handy and easy to use

bubbles and crystal-rich layers that form as lava flows onto the surface of stone —

Smoky Quartz 10x14mm Barrel - Large Hole Beads 20x40mm It is opaque and occursSmoky 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.