Opal from Hopffeldboden, Hopffeld area, Neukirchen am Großvenediger, Zell am See District, Salzburg, Austria
Austria | |
| [Opal-A var. Opal-AN] Strasser, Albert (1989) Die Minerale Salzburgs. Albert Strasser, Salzburg. |
Austria | |
| [Opal-A var. Opal-AN] Strasser, Albert (1989) Die Minerale Salzburgs. Albert Strasser, Salzburg. |