Mixed Minerals — Marin Mineral

Mixed Minerals
August 13, 2025 · 11 specimens

R347 - Amethyst with Prehnite, Calcite $3,000 available

Goboboseb Mtns., Erongo Region, Namibia
Cabinet - 9.5 x 7 x 5.5 cm

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Two larger Quartz crystals set with colorless rhombs of Calcite and a cluster of vivid green Prehnite. A gorgeous combo specimen from this prolific locality which typically produces single crystals. The main crystal is 6.5cm tall and has both smokey and amethyst coloration. The Quartz and Prehnite are undamaged.

R348 - Hematite with Quartz $350 available

Veta Grande claim, Dome Rock Mtns., La Paz Co., Arizona, USA
Small Cabinet - 5.2 x 3.5 x 3.5 cm

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Old Arizona classic of bright metallic Hematite crystals standing up on edge amongst a Quartz crystals. The Hematite crystals reach 1cm in size and are undamaged.

R349 - Azurite on Malachite $275 available

La Sal, San Juan Co., Utah, USA
Small Cabinet - 5.5 x 4 x 3.0 cm

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Deep blue crystals of Azurite in a vug lined with velvety green Malachite. Beautiful specimen of a different style than the typical floater rosette formations seen from the locality.

R350 - Calcite sold

Rodeo, Chihuahua, Mexico
Miniature - 5 x 4.5 x 3 cm

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Complete single rhomb of translucent to transparent, colorless Calcite. Has flattened faces on two opposing sides. Comes with a couple old labels (one calling this 'basal plate' Calcite).

R351 - Hematite sold

Hormuz Island, Qeshm, Hormozgan, Iran
Thumbnail - 1.2 x 1.0 x 1.0 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. Doubly-terminated crystal silvery in color with bright metallic luster. Complete and undamaged with uniform shape though with a bit of cavernous growth and contact on part of one face. These are found in an iron mine on an island located 8 kilometers off the coast of Iran.

R352 - Sphene $300 available

Capelinha, Minas Gerais, Brazil
Miniature - 3.7 x 2 x 0.7 cm

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Complete single Sphene (Titanite) crystal from old finds in Brazil. Bright lime green color, translucent to transparent, with complex growth formations on one side. Very minor edge chips, otherwise undamaged.

R354 - Silver on Acanthite sold

Imiter mine, Draa-Tafilalet Region, Morocco
Miniature - 3.5 x 3.0 x 2.0 cm

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Thick, ropey Silver wires on dark metallic Acanthite crystals. While there have been plentiful man-made Silver on Acanthite specimens (made by heating Acanthite crystals to produce bright, lustrous Silver wires in hair-like masses grown out of the Acanthite), specimens with natural Silver wires are uncommon. Acquired at the Tucson show in the early 2000s from the original finds, I was only able to find a select few after sorting through hundreds of specimens. This was the best one I was able to acquire.

R355 - Rhodonite sold

Franklin, Sussex Co., New Jersey, USA
Small Cabinet - 5.5 x 4.5 x 4.5 cm

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