Mixed Minerals — Marin Mineral

Mixed Minerals
September 24, 2025 · 14 specimens

R453 - Pyromorphite sold

Mount Isa, Queensland, Australia
Small Cabinet - 6.3 x 5.3 x 2 cm

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Curving, barrel-shaped Pyromorphite crystals scattered across a tan rock matrix. Fine undamaged crystals. This appears to be somewhat of a floater breccia fragment as there is another Pyromorphite crystal and black mineralization on the backside. Ex. Carl Acosta collection.

R454 - Malachite ps. Barite $900 available

Mashamba West Mine, Lualaba, DR Congo
Miniature - 5 x 4 x 3 cm

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Bladed crystals of Barite that have pseudomorphed to velvety Malachite. Well crystallized all around, even on the bottom! Ex. Carl Acosta collection (Carl paid $1100 for this when he bought it).

R455 - Leadhillite, Cerussite, Anglesite ps. Galena sold

Jean Cave Manto, Level 4, Mina El Potosi, Santa Eulalia, Chihuahua, Mexico
Small Cabinet - 5.5 x 4 x 3.5 cm

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Leadhillite, Cerussite, Anglesite ps. Galena

Skeletal Galena crystals partially pseudomorphed to Leadhillite, Cerussite, and Anglesite with attached clear Calcite crystals. Collected in 2005 and in excellent condition. An interesting one to explore with a loupe! Ex. Carl Acosta collection.

R456 - Quartz over Calcite $1,200 available

Inglaterra Mine, Santa Eulalia, Chihuahua, Mexico
Small Cabinet - 5.5 x 4 x 3.5 cm

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Large white rhombs of Calcite with an outer coating of clear Quartz, all on a Sphalerite matrix. The largest crystal is 4cm. Undamaged. Ex. Carl Acosta collection.

R457 - Smithsonite $900 available

Berg Aukas Mine, Grootfontein, Namibia
Thumbnail - 2.8 x 2 x 1.5 cm

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Lustrous, translucent to transparent green Smithsonite crystals from the Berg Aukus Mine. Main crystal is 2.5cm and doubly-terminated. Ex. Carl Acosta collection.

R458 - Herderite $1,200 available

Xanda Mine, Virgem De Lapa, Minas Gerais, Brazil
Miniature - 3.5 x 2 x 1.8 cm

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Fine old purple Herderite crystal cluster from the Xanda Mine. The main crystal is twinned and doubly-terminated, 3.5cm long. Well crystallized all around and nearly pristine with minor edge chips. Ex. Carl Acosta collection.

R459 - Acanthite $2,250 available

Reyes Mine, Guanajuato, Mexico
Miniature - 3.7 x 2.0 x 1.7 cm

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Fine quality, well crystallized old Acanthite specimen from Guanajuato. Ex. Carl Acosta collection.

R460 - Zircon sold

Sri Lanka
Thumbnail - 1.1 x 1.1 x 0.8 cm

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Transparent blue single Zircon crystal from Sri Lanka. Has good crystal faces over much of the crystal. Weighs 10.35 carats. Ex. Carl Acosta collection and comes with an old Irenee DuPont collection label.

R461 - ManganoCalcite on Calcite sold

Dal'Negorsk, Russia
Thumbnail - 3 x 3 x 2.8 cm

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Lenticular pink ManganoCalcite crystals grown horizontally on a single white scalenhedral Calcite crystal. Well crystallized all around. Fine quality aesthetic specimen! Ex. Carl Acosta collection.

R462 - Quartz scepter $950 available

Big Sulfur Creek Canyon, near Socrates Mine, Sonoma Co., California, USA
Small Cabinet - 7 x 2 x 1.5 cm

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Glassy single Quartz crystal from an obscure California locality. The locality is in a Mercury mining district and a small number of these unusual Quartz crystals were found near the Socrates Mine. The crystal has inclusions, is sceptered, and rehealed at the base. The main termination faces have hoppered (Fenster) growth. Complete and undamaged. This is a really neat crystal both for the locality and the interestest growth features. Ultra rare crystal for a Quartz collector. Ex. Carl Acosta collection.

R463 - Benitoite, Neptunite, Joaquinite sold

Gem Mine, San Benito Co., California, USA
Small Cabinet - 6.2 x 4.2 x 2.2 cm

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Blue Benitoite crystals on white Natrolite on a schist matrix. The Benitoite on this specimen have very nice blue coloration and transparency. There is also a small doubly-terminated Neptunite present and a single brown Joaquinite crystal.

R464 - Benitoite, Neptunite, Joaquinite sold

Gem Mine, San Benito Co., California, USA
Miniature - 4.8 x 2.5 x 1.5 cm

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Two blue Benitoite crystals on white Natrolite on a schist matrix. There is also a 1.5cm doubly-terminated Neptunite present and a single brown Joaquinite crystal.

R466 - Axinite sold

Puiva Mountain, Saranpaul, Berezovo district, Russia
Thumbnail - 3 x 2 x 1.0 cm

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Razor-sharp, glassy single Axinite crystal in perfect condition. This locality is well known for producing these fantastic, perfect floater crystals. This is a 'textbook' gem crystal with good transparency and a few smaller crystals sticking out on one side.

R467 - Smithsonite sold

Tsumeb, Namibia
Miniature - 3.2 x 2.0 x 2 cm

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Pink/orange elongated Smithsonite crystals on a slightly iridescent metallic matrix.

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