Dragon Minerals - March 16, 2024 Update

Click 'refresh' or 'reload' on your browser to make sure you have the newest version of this page.
Sold specimens are removed from the web site.

Click an image to enlarge. Click the locality for more information.

42323: Fayalite, Cristobalite and Obsidian - $10
Little Lake Perlite deposits, Sugarloaf Mountain, Coso Mining District, Coso Mountains, Inyo County, California
Miniature - 4.4 x 3.6 x 2.9 cm
32 grams
Specimen status: Available
Send an email with specimen number to order

Vesicles in a dark obsidian matrix host partial balls of off white, grainy cristobalite (no distinct crystals are seen). In one cristobalite cavity we see numerous small blades of dark fayalite. These need magnification for best appreciation. Cristobalite is a quartz polymorph - SiO2, whereas fayalite is an iron nesosilicate - Fe2+2SiO4.

Return to March 16, 2024 Update page   |   Return to Dragon Minerals home