Mixed Minerals — Marin Mineral

Mixed Minerals
August 1, 2025 · 10 specimens

R310 - Tellurium sold

Emperor Mine, Viti Levu, Fiji
Small Cabinet - 7.5 x 7 x 4 cm

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Large open vug with bright silvery-white colored metallic crystals of Tellurium. The world's finest Tellurium are crystals such as these from the Emperor Mine in Fiji. The crystals are present in two sides of the vug and very sharp and lustrous, reaching 4mm in size. Ex. Carl Acosta collection.

R311 - Hessite with Quartz sold

Botes, Alba Co., Romania
Thumbnail - 2.2 x 1.6 x 1.6 cm

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Black Hessite crystals atop transparent Quartz crystals. Hessite is a very rare silver telluride species and the world's best come from Botes. Mounted on small black wooden stand with a date of 1887 painted on it. Ex. Carl Acosta collection.

R312 - Azurite (transparent!) sold

Milpillas Mine, Cuitaca, Sonora, Mexico
Thumbnail - 3 x 3 x 1.2 cm

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Glassy, tabular Azurite crystal partially pseudomorphed to Malachite. The upper portions of the crystal look like blue glass when backlit. Ex. Carl Acosta collection.

R313 - Calcite on Conichalcite $400 available

Zacatecas, Mexico
Small Cabinet - 6.5 x 5.5 x 3.5 cm

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Large white Calcite crystals to 2.5cm atop green Conichalcite. Ex. Carl Acosta collection.

R314 - Alexandrite sold

Malysheva, Sverdlovsk Oblast, Ural Mtns., Russia
Thumbnail - 0.8 x 0.7 x 0.5 cm

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Crystallized specimen of Chrysoberyl var. Alexandrite from the Ural Mountains in Russia. Alexandrite was first reported in Russia in the 1800s and named after Czar Alexander II. Weighs 2.9 carats with transparent areas.

R317 - Pyrite on Quartz sold

West Colusa Mine, Butte, Silver Bow Co., Montana, USA
Miniature - 4.5 x 3.5 x 1.5 cm

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Bright metallic Pyrite crystals with Quartz crystals.

R319 - Hematite sold

Hormuz Island, Qeshm, Hormozgan, Iran
Thumbnail - 1.3 x 1.2 x 1.1 cm

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Single, stout hexagonal prism of Hematite, an uncommon crystal form for Hematite that reminds me of a style rarely seen in Kalahari Hematite crytals. Silvery in color with bright metallic luster. Complete and undamaged with uniform shape. These are found in an iron mine on an island located 8 kilometers off the coast of Iran.

R320 - Copper $250 available

Caledonia Mine, Ontonagon Co., Michigan, USA
Miniature - 3.2 x 1.5 x 1 cm

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Sharply formed, large-sized Copper crystal from Michigan. Nicely shaped all around with a good red patina.

R321 - Quartz $75 available

Suttrop, Warstein, Nordrhein-Westfalen, Germany
Thumbnail - 2 x 1.2 x 1.0 cm

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Doubly-terminated Quartz crystal with uniform shape. Has a more translucent outer layer over a more milky-colored core. Complete and undamaged.

R323 - Buergerite $125 available

Mexquitic, San Luis Potosi, Mexico
Thumbnail - 1.3 x 1.3 x 1.3 cm

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Fine thumbnail-sized specimen of Buergerite (FluorBuergerite). Main crystal is 1 cm in size and equant in form, looking almost like a garnet. Beugerite is a rare species in the Tourmaline group. This locality (the Type locality) produces the world's best specimens. Interestingly, this locality was once lost for many years and later rediscovered.

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