Smoky Quartz 6-7mm Faceted Tyre - 8 Inch Disc There are 37 different mica

There are 37 different mica minerals

It is a particularly unusual gem because it exhibits a special optical property known as "tenebrescence

When moving through the Earth’s atmosphere

What makes Opal distinct is what is referred to as ‘play of color’

The Ruby inclusions in this stone are pink to reddish purple to dark purple

Smoky Quartz 6-7mm Faceted Tyre - 8 Inch Disc There are 37 different micaSmoky 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.