Mixed Minerals — Marin Mineral

Mixed Minerals
April 20, 2026 · 15 specimens

R913 - Sodalite var. Hackmanite sold

Ladjuar Medam, Sar-e-Sang, Koksha Valley, Badakhshan, Afghanistan
Small Cabinet - 7 x 5.5 x 5 cm

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Vivid purple crystals of Hackmanite to 1.8cm in size on matrix with Fluorichterite. The crystals on this specimen are exceptional in many ways. First, the color is a saturated purple compared to most which are pale blue or pale purple. The crystals also have sharp edges and luster - so many have more worn looking or rounded edges. The main crystal is also very 3 dimensional sticking up off the matrix with crystal faces all around. A superb Hackmanite with undamaged crystals. Ex. Carl Acosta, Paul Stahl collections.

R914 - Tourmaline sold

Priatnoe pegmatite, 4500 meter elevation, Kukurt Sai Valley, East Pamir Mtns., Tajikistan
Miniature - 4.3 x 0.8 x 0.8 cm

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Colorful single Tourmaline crystal with multiple color zones of yellows, pinks, greens, and red at the termination. Complete all around and undamaged. This is a rare, hard to find Tourmaline crystal found in a series of 5 pockets, each no larger than a softball. Weighs 5.40 grams.

R915 - Nifontovite sold

Rey Y Reina Mine, Charcas, San Luis Potosi, Mexico
Small Cabinet - 5.8 x 0.7 x 0.6 cm

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Highly transparent single crystal of Nifontovite from Charcas. Complete all around and undamaged water-clear crystal. From recent finds of larger than normal crystals for the species. Better than photos which don't convey just how bright and glassy the crystal is.

R916 - Nifontovite $300 available

Rey Y Reina Mine, Charcas, San Luis Potosi, Mexico
Miniature - 3.8 x 0.8 x 0.6 cm

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Highly transparent single crystal of Nifontovite from Charcas. Complete all around water-clear crystal, nearly pristine. From recent finds of larger than normal crystals for the species. Better than photos which don't convey just how bright and glassy the crystal is.

R917 - Nifontovite $300 available

Rey Y Reina Mine, Charcas, San Luis Potosi, Mexico
Miniature - 4.3 x 1 x 0.7 cm

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Highly transparent single crystal of Nifontovite from Charcas. Complete all around and undamaged water-clear crystal with an attached side crystal adding character to what are usually singles. From recent finds of larger than normal crystals for the species. Better than photos which don't convey just how bright and glassy the crystal is.

R918 - Woodhouseite on Quartz sold

Champion Mine, Mono Co., California, USA
Miniature - 4.5 x 4 x 1.8 cm

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Well isolated Woodhouseite crystals to 8mm on a flat matrix face coated by small Quartz crystals. There are four main undamaged crystals well centered on the Quartz, with additional small crystals on the edges. The Champion Mine is the Type locality for this rare species and has produced the world's best specimens.

R919 - Sapphire $120 available

Ratnapura, Sri Lanka
Thumbnail - 1.9 x 0.8 x 0.6 cm

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Single yellow Sapphire crystal with good transparency and sharper than most edges.

R920 - Linarite on Galena with Brochantite sold

Bingham, Socorro Co., New Mexico, USA
Thumbnail - 3.0 x 2.0 x 1.8 cm

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A 1cm (on edge) cube of Galena set atop Quartz crytals. The Galena is partially coated by blue Linarite. A colorful and superb thumbnail of this association. Ex. Carl Acosta collection.

R921 - Aquamarine $75 available

Erongo Mtns., Namibia
Miniature - 4 x 2.8 x 2.5 cm

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Cluster of light blue, hexagonal prisms of Aquamarine.

R922 - Pyrite sold

Merelani Hills, Arusha, Tanzania
Thumbnail - 2.6 x 2.5 x 1.8 cm

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Bright single Pyrite crystal from the Merelani Tanzanite mines. Pyrite from Merelani is noted for it's high luster and complex form, and this specimen is a fine thumbnail example displaying those qualities. Well crystallized all around in great condition with only minor edge chipping. Superb bright metallic luster.

R923 - Aquamarine $120 available

Erongo Mtns., Namibia
Thumbnail - 1.5 x 1.2 x 1 cm

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Glassy and gemmy single blue Aquamarine crystal. Complete and undamaged with complex bevelled termination.

R924 - Amethyst scepter $150 available

Mondo Mine, Tanzania
Thumbnail - 2.5 x 1.5 x 1.3 cm

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Glassy, transparent Amethyst scepter atop a white Quartz stalk. Complete all around with dark needle-like inclusions. The Amethyst is somewhat pseudocubic in form and appears rectangular at certain angles.

R925 - Malachite after Azurite $450 available

Sacramento Mine, Bisbee, Cochise Co., Arizona, USA
Small Cabinet - 8 x 7 x 5 cm

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Sharply formed crystals of Malachite pseudomorphs after Azurite covering top surface of matrix. Loads of fine undamaged crystals acrosss the top, along with areas of non-pseudomorphic Malachite. More Malachite in vugs on other side too. Ex. John V. Mitchell collection dating back to the 1920s.

R926 - Malachite slab sold

Lualaba, DR Congo
Cabinet - 11 x 8 x 0.7 cm

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Cut and polished slab of banded Malachite. Beautiful formation with excellent polish on both sides. This was my keeper from the many I have bought over the years. Ex. Mike Keim collection.

R927 - Vesuvianite sold

Stifle Memorial Claim, Georgetown, El Dorado Co., California, USA
Miniature - 3.2 x 1.8 x 1.2 cm

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Cluster of purple to light yellow Vesuvianite crystals from a spectacular recent find in northern California. Main crystal is 1.2 x 0.8 cm. Larger crystals on one side, but the other side with small crystals is also great. No matrix, nothing but Vesuvianite crystal all around.

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