Mixed Minerals — Marin Mineral

Mixed Minerals
January 6, 2026 · 13 specimens

R675 - Benitoite with Neptunite sold

Gem Mine, San Benito Co., California, USA
Small Cabinet - 7 x 7 x 3.0 cm

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Good combination specimen of 3 deep blue Benitoite crystals with several black Neptunite crystals. The Benitoite reach 8mm in size and have good blue color and good luster on side faces. The Neptunite reach 2.5cm and are both sticking up and lying flat on the matrix.

R677 - Benitoite sold

Gem Mine, San Benito Co., California, USA
Small Cabinet - 7.5 x 4 x 4 cm

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Etched blue Benitoite crystals on matrix with white Natrolite. This one is loaded with crystals. The Benitoite reach 1.0cm in size and are glassy with etched growth formations.

R678 - Calcite sold

Tonglushan Mine, Daye, Hubei Prov., China
Small Cabinet - 7 x 4 x 3.5 cm

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Colorful and interesting specimen featuring 2 generations of Calcite. Gemmy golden Calcite crystals have overgrown a large single, white, scalenohedral Calcite crystal. One half of the specimen shows transparent golden Calcite, the other half is red due to Hematite inclusions within the Calcite. Undamaged.

R679 - Smokey Quartz $250 available

Anderson's Gully, Moorella, Victoria, Australia
Miniature - 4 x 4 x 3.5 cm

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Cluster of glassy, transparent smokey Quartz crystals on matrix from Moorella, Australia. This is a great example from the occurrence and was collected long ago. The crystals stand upright on the matrix and are complete all around and undamaged.

R680 - Smithsonite sold

Rush, Marion Co., Arkansas, USA
Small Cabinet - 5.5 x 4.2 x 3.8 cm

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Sparkling drusy yellow Smithsonite covering matrix.

R681 - Red Beryl sold

Violet Claim, Wah Wah Mtns., Beaver Co., Utah, USA
Thumbnail - 3 x 1.5 x 1.5 cm

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Glassy Red Beryl crystal on a Rhyolite matrix. The crystal forms a sharp hexagonal prism 9mm in length. The crystal is well formed with areas of transparency and doubly-terminated.

R682 - Red Beryl $350 available

Violet Claim, Wah Wah Mtns., Beaver Co., Utah, USA
Thumbnail - 2.5 x 2.5 x 1.8 cm

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Glassy Red Beryl crystal on a Rhyolite matrix. The crystal forms a thick, sharp hexagonal prism 9mm in length. The crystal is well formed with a natural indent along the side, has areas of transparency and is doubly-terminated.

R683 - Red Beryl $380 available

Violet Claim, Wah Wah Mtns., Beaver Co., Utah, USA
Thumbnail - 3 x 2.2 x 1.1 cm

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Glassy Red Beryl crystals on a Rhyolite matrix. The crystals reach 1.2cm in length.

R684 - Azurite on Malachite $240 available

Tsumeb, Namibia
Miniature - 4.5 x 3 x 2.5 cm

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Glassy blue Azurite crystals atop rounded masses of Malachite.

R685 - Mimetite $145 available

Tsumeb, Namibia
Miniature - 3.8 x 2.5 x 1.5 cm

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Tall, spikey yellow crystals of Mimetite from Tsumeb. Crystals reach 8mm in size.

R686 - Willemite sold

Tsumeb, Namibia
Thumbnail - 3.0 x 2 x 2 cm

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Translucent blue Willemite on matrix from Tsumeb.

R687 - Cerussite $450 available

Tsumeb, Namibia
Thumbnail - 3.0 x 2.5 x 2.5 cm

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Glassy, transparent Cerussite crystal cluster on matrix. Undamaged.

R688 - Hematite $300 available

Hormuz Island, Qeshm, Hormozgan, Iran
Thumbnail - 1.4 x 1 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. Partially doubly-terminated crystal silvery in color with bright metallic luster. Complete and undamaged with uniform shape and smaller attached crystals. These are found in an iron mine on an island located 8 kilometers off the coast of Iran.

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