Mixed Minerals — Marin Mineral

Mixed Minerals
June 13, 2024 · 14 specimens

P293 - Topaz sold

Ouro Preto, Minas Gerais, Brazil
Small Cabinet - 7.2 x 2.2 x 1.8 cm

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Large single 'Imperial Topaz' crystal from Brazil. It's complete all around with good glassy luster and very minimal edge chipping. Weighs 54.31 grams.

P294 - Galena sold

Tsumeb, Namibia
Small Cabinet - 8 x 5 x 4.5 cm

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Rare specimen of Tsumeb Galena crystals with luster! The crystals have striated surfaces with metallic luster (most are dull!). The matrix is also interesting, composed of platy, crystalline Tennantite and/or Chalcocite. This is a significant Tsumeb Galena from the Carl Acosta collection, that had a $4500 price tag on it when Carl bought it many years ago. It was also the hardest specimen for Carl to part with out of a recent collection release.

P295 - Chabazite on Prehnite after Tanzanite $1,200 available

Merelani Hills, Arusha, Tanzania
Miniature - 3.6 x 3.4 x 2.8 cm

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Blue Prehnite that has coated or pseudomorphed a fan-shaped cluster of Tanzanite. Small brown Chabazite crystals are sprinkled on the Prehnite. This is a near floater with just a small contact and Graphite on the left side, otherwise nothing but fine quality crystals all around. Ex. Mike Keim Merelani suite.

P296 - Pyrite on Diopside sold

Merelani Hills, Arusha, Tanzania
Miniature - 3.5 x 3.2 x 2.2 cm

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Lustrous metallic Pyrite crystals on glassy green Diopside crystals. The largest Pyrite is 1.6cm wide. This is an uncommon association as most Pyrite from Merelani occur as single crystals. It's the only one like it I've seen and there are no others shown on Mindat. Ex. Mike Keim Merelani suite.

P297 - Prehnite on Tanzanite $1,800 available

Merelani Hills, Arusha, Tanzania
Thumbnail - 2.8 x 1.7 x 1.4 cm

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Blue Tanzanite crystals with attached yellow Prehnite crystals. Aesthetic, colorful combination of the two species that is natural and unheated. There are two complete Tanzanite crystals (and a partial crystal) and two Prehnite. Much of the main Tanzanite is transparent and gem quality. The lower Prehnite is a cluster of crystals and the upper is a perfect, doubly-terminated single crystal. Ex. Mike Keim Merelani suite.

P298 - Allanite on Tanzanite $3,000 available

Merelani Hills, Arusha, Tanzania
Thumbnail - 1.8 x 1 x 0.9 cm

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Transparent single Tanzanite crystal with an attached Allanite crystal (I had this analyzed many years ago though no longer retain the report). This is a complete undamaged crystal, natural and unheated. It's also 18.5 carats of pure gem rough. Ex. Mike Keim Merelani suite.

LP750 - Prehnite $280 available

Merelani Hills, Arusha, Tanzania
Thumbnail - 3.0 x 2.5 x 1.8 cm

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Floater cluster of translucent to transparent Prehnite crystals. The crystals are more individual and distinct than most. Nothing but great crystals all around with very minor amounts of Graphite. Ex. Mike Keim Merelani suite.

P299 - Tourmaline sold

Ofiki, Oyo State, Nigeria
Miniature - 4 x 2 x 1.8 cm

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Transparent single Tourmaline crystal from finds of approximatley 20-25 years ago. Gem-quality vibrant pink for it's entire length, with zones of more brownish pink at the base. Complete all around with minor edge chipping. Weighs 8.07 grams.

P300 - Dravite sold

Mwajanga, near Komolo, Tanzania
Thumbnail - 1.8 x 1.3 x 1.1 cm

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Colorful single Dravite crystal from Mwajanga. This locality most commonly produced brown Dravites, with rare finds of crystals with pink, blue, or yellow. Though small, this crystal had the best pink color of any crystal I've seen from this locality. The crystal grades from brown at the base to hot pink to a thin more yellow at the termination. Complete and undamaged. Weighs 4.54 grams.

P301 - Analcime on Quartz sold

Goboboseb Mtns., Erongo Region, Namibia
Miniature - 3.5 x 1.6 x 1.4 cm

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Transparent single Quartz crystal with some purple Amethyst coloration and red Hematite inclusions. The back 3 faces are coated with sparkling transparent Analcime crystals. The termination faces and front crystal faces are exposed and highly lustrous. Outstanding, undamaged example.

P303 - Inesite sold

Wessels Mine, Kuruman, South Africa
Miniature - 5 x 4 x 3.5 cm

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Complete spherical cluster of red/pink Inesite on matrix. Oustanding undamaged example. Ex. Desmond Sacco collection.

P304 - Stilbite on Apophyllite sold

Poona, Maharashtra State, India
Miniature - 4.2 x 3.3 x 3.2 cm

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Starburst spray of transparent green Apophyllite crystals on a tiny amount of matrix. Isolated, individual while Stilbite crystals are attached. Undamaged, high quality crystals.

P305 - Boleite $450 available

Amelia Mine, Santa Rosalia, Baja Sur, Mexico
Thumbnail - 0.8 x 0.6 x 0.6 cm

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Lot of 15 Boleite cubes and clusters of cubes. An old stash of crystals that will be shipped in the original old plastic boxes they came in.

P306 - Tourmaline $2,800 available

Sapo Mine, Minas Gerais, Brazil
Miniature - 3.7 x 1.7 x 1.3 cm

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Glassy single Tourmaline with attached Lepidolite from the Sapo Mine. The crystal is translucent to transparent, pink in the center with blue terminations. The top termination is lustrous with fabulous trigonal growth features; the bottom termination is slightly cavernous and rehealed. Complete and undamaged and weighs 16.35 grams. Ex. James Simpson collection.

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