Horse Lake Mountain Hornblende Occurence, Wenatchee Mining District, Chelan County, Washington, USA |
NaCa2(Mg4Fe3+)(Si6Al2)O22(OH)2 - Occurs as well-formed black euhedral phenocrysts in light gray andesite. | |
CaCO3 - Occurs within a centimeter-scale vein crosscutting the andesite, White dogtooth calcite crystals can be found crystallized within the interior of the vein. Smaller second-generation crystals can be found crystallized on the dogtooth crystals. Some crystals are coated with white opal that strongly fluoresce under ultraviolet light. |
Amphibole (Hornblende) |
Amphibole (Hornblende) Photo Copyright © Joe George of Cascade Scepters |
Calcite |