Jet from Rocky Mountains, North America
USA | |
| Kunz,1892. Gems & Precious Stones of N. America, p.203. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
USA | |
| Kunz,1892. Gems & Precious Stones of N. America, p.203. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |