Smoky Quartz
Smoky or smokey quartz is a brown to black variety of quartz. Like other quartz gems, it is a silicon dioxide crystal. The smoky color results from free silicon, formed from the silicon dioxide by natural irradiation.
Read more about Smoky Quartz: Uses
Famous quotes containing the word smoky:
“O, he is as tedious
As a tired horse, a railing wife,
Worse than a smoky house.”
—William Shakespeare (1564–1616)