Smoky quartz and feldspar. Photo courtesy Matt Fisher, Colorado Prospector Club.
Opaque Black Quartz Specimen from United States
Smoky quartz and feldspar. Photo courtesy Matt Fisher, Colorado Prospector Club.
Article: A Visitor’s Guide to Colorado Gemstones
Credit: Colorado Prospector Club
| Gemstone | Quartz, Smoky Quartz |
| Natural or man made | Natural |
| Origin | United States |
| Origin details | Colorado |
| Gem State | Specimen |
| Color | Black |
| Transparency | Opaque |