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
Other articles related to "smoky quartz, quartz":
... Sunglasses, in the form of flat panes of smoky quartz, were used in China in the 12th century ...
... A central quartz mass was described more than 40 ft (12 m) across, with distinct white bands, from one-eighth to one-half inch wide ... Between these bands the quartz is glassy and clear ... At one place a vug was found large enough for a man to enter, lined with smoky quartz crystals reaching 1000 lb (500 kg) or more in weight ...
Famous quotes containing the word smoky:
“A lustreless protrusive eye
Stares from the protozoic slime
At a perspective of Canaletto.
The smoky candle end of time
—T.S. (Thomas Stearns)