Opal-AN from Maryland, USA
USA | |
| [var. Hyalite] Jat Thompson Collection |
| [var. Hyalite] Jat Thompson |
| Stuart Herring Collection |
| Minerals of Maryland (1940) Charles Ostrander and Walter E. Price, Jr., Natural History Society of Maryland. p. 56 Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p. |
| Cordua, Bill (1969) Mineralogy of a newly exposed granite near White Oaks, MD: Rocks and Minerals: 44 (2): 114-115. |
White Oak, Montgomery County, Maryland, USA