Indonesian Pyrite with Quartz B Obsidian minerals (primarily calcite and aragonite)

minerals (primarily calcite and aragonite) fill in the cracks

frequently in combination with zeolites like apophyllite or as pseudomorphs after laumontite

Blue onyx is composed of silicon dioxide

Weighing  0

Indonesian Pyrite with Quartz B Obsidian minerals (primarily calcite and aragonite)This specimen comes from a gold mine near West Kalimantan Indonesia. We DO NOT think there is any gold or silver, however, this piece does have a marvelous cluster of striated pyrite crystals on quartz. The matrix has been trimmed to site well in a display. Measuring 4. 8 in length, 1. 5 inches in height, 1. 3 inches in width. Weighing 2 pounds. Customer will receive the exact item pictured.