Marin Mineral
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Fine Mineral Specimens for Collectors
Mike Keim, P.O. Box 5256 Larkspur, California, 94977 (415) 342 - 1852
Some of our Featured Specimens:
Azurite
Touissit Mine, Morocco
Azurite with Malachite
Volborthite Pocket, Milpillas Mine, Cuitaca, Sonora, Mexico
Tourmaline
Rubaya, North Kivu, Dem. Rep. of Congo
Montebrasite
Minas Gerais, Brazil
Malachite after Azurite
Sacramento Mine, Bisbee, Cochise Co., Arizona, USA
Cuprite with Silver
Poteryaevskoe Mine, Rubtsovskoe deposit, Siberia, Russia
Browse the Updates:
Mixed Minerals
October 30, 2026
Mixed Minerals
October 28, 2026
Mixed Minerals
October 7, 2026
Thumbnails
October 3, 2026
Thumbnails
October 1, 2026
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