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:
“Justice shines in very smoky homes, and honors the righteous; but the gold-spangled mansions where the hands are unclean she leaves with eyes averted.”
—Aeschylus (525–456 B.C.)