Dravite from Baltimore County, Maryland, USA
USA | |
| Bernstein, L.R. (1976) Minerals of Washington D.C. and vicinity. U.S. Geological Survey Open-File Report 76-849, 183 pages. |
| Ref: Minerals of the Washington, D.C Area. |
| Rocks & Min.: 21:274-275. |
USA | |
| Bernstein, L.R. (1976) Minerals of Washington D.C. and vicinity. U.S. Geological Survey Open-File Report 76-849, 183 pages. |
| Ref: Minerals of the Washington, D.C Area. |
| Rocks & Min.: 21:274-275. |
Bluegrass Company Quarry, Texas, Baltimore County, Maryland, USA