Anorthite from
Costa Rica | |
| [var. Bytownite] |
| E.L. Clopton collection, IDs by Dr. William G. Melson, Dept. of Volcanology & Petrology, Smithsonian Institution |
Costa Rica | |
| [var. Bytownite] |
| E.L. Clopton collection, IDs by Dr. William G. Melson, Dept. of Volcanology & Petrology, Smithsonian Institution |
Arenal Volcano, Arenal Vulcano National Parc, San Carlos Canton, Alajuela Province, Costa Rica