- Hemimorphite, Calcite
- Cabinet, 11.0 x 9.7 x 3.6 cm
- Summit Mine (Old Summit; Montana Silver Star), Radersburg District (Cedar Plains District; Lone Mountain District), Broadwater Co., Montana, USA
An impressive cabinet plate of lustrous, translucent and colorless hemimorphite blades to 2.5 cm from the less well-known Summit Mine of Montana. The hemimorphite blades have a rich, preferential coating of snow-white, globular calcite. The Summit Mine has produced some of the finest hemimorphite in the United States and this is a fine, highly representative, large specimen. From an old US collection.