Acosta Tsumeb Minerals — Marin Mineral

Acosta Tsumeb Minerals
May 27, 2024 · 15 specimens

P267 - Mangano Smithsonite sold

Tsumeb, Namibia
Miniature - 4 x 3.5 x 3.5 cm

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Well balanced miniature with large reddish pink rhombs of Mangano Smithsonite on matrix. The largest crystal reaches an impressive 2cm in size. The Smithsonite occurs as both clusters and as well separated crystals. Ex. Carl Acosta collection.

P268 - Cobaltian Smithsonite $2,500 available

Tsumeb, Namibia
Miniature - 4 x 3.7 x 1.8 cm

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Fine, highly aesthetic miniature of Cobaltian Smithsonite. The crystals are sharp, lustrous, and show internal phantoms. The largest crystal reaches an impressive 2.1cm in size. Ex. Carl Acosta collection.

P269 - Calcite on Tennantite $400 available

Tsumeb, Namibia
Small Cabinet - 5.9 x 4 x 4 cm

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Cluster of large black Tennantite crystals with attached colorless rhombs of Calcite. The Tennantite are well crystallized all around but show some contacts on the bottom. The Calcite crystals cover most of the bottom indicating it detached from the pocket and was later coated by the Calcite crystals. There are also some tiny Quartz crystals present and an unidentified platy metallic mineral. Ex. Carl Acosta collection.

P270 - Brochantite sold

Tsumeb, Namibia
Thumbnail - 3 x 2 x 2 cm

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Sharp, stout prismatic Brochantite crystals from Tsumeb. Brochantite was rare from Tsumeb and rarer still in stout, well terminated crystals (most formed acicular crystals). The crystals reach 4mm in size, some doubly-terminated, and have grown on a silicous matrix coated by drusy Quartz. There are also spherical massess of an unidentified light green mineral present. Ex. Carl Acosta collection.

P272 - Dolomite after Tarnowitzite with Copper on Dolomite cast $500 available

Tsumeb, Namibia
Miniature - 4.5 x 4.5 x 3.5 cm

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Dolomite after Tarnowitzite with Copper on Dolomite cast

A really interesting and classic Tsumbe combo specimen of multiple species. At first glance this appears to be 'just' a Dolomite cast, however upon examination you see a number of attached white pseudomorphs of zincian Dolomite after Tarnowitzite. There are two such pseudomorphs on the top surface and another two on the bottom surface. Also present are small green altered Copper crystals (the red metallic Copper color showing through on some crystals). On the bottom surfaces are areas of light green crystals, possibly Smithsonite. Ex. Carl Acosta collection and comes with a few old labels.

P273 - Malachite after Azurite on Smithsonite sold

Tsumeb, Namibia
Thumbnail - 2.8 x 2 x 1.5 cm

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Fine an undamaged specimen featuring a sharply formed pseudomorph of Malachite after Azurite on Smithsonite crystals. A tiny Azurite crystal is also present on the Smithsonite. Wow! Ex. Carl Acosta collection.

P274 - Cobaltian Dolomite sold

Tsumeb, Namibia
Miniature - 3.8 x 2 x 1.5 cm

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Vivid pink Cobaltian Dolomite crystals from Tsumeb. One end shows an open hollow cast after a now gone crystal. Comes mounted in a Perky box. Ex. Carl Acosta, Gene Reynolds collections.

P275 - Cuprian Smithsonite $2,000 available

Tsumeb, Namibia
Small Cabinet - 8 x 5.5 x 3 cm

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Specimen of solid bright green Cuprian Smithsonite crystals. This is an uncommon thick cluster of Smithsonite without matrix (you can backlight the specimen to show it is nothing but translucent Smithsonite). Undamaged with good crystals on top and bottom sides. Comes with 5 old labels. Ex. Carl Acosta, Dawn and Jim Minette, Marty Zinn collections.

P276 - Dioptase, Calcite sold

Tsumeb, Namibia
Small Cabinet - 6.5 x 4 x 4 cm

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Dioptase included Calcite crystals that are mostly covered by a second generation of drusy Calcite. Individual Calcite crystals reach 1.5cm wide. Undamaged and attractive. Ex. Carl Acosta collection.

P278 - Calcite on Malachite $300 available

Tsumeb, Namibia
Small Cabinet - 7.5 x 4.5 x 4 cm

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White Calcite crystals atop a layer of botryoidal Malachite. The top surface of the Malachite is smooth and rounded while the bottom surface is satiny with small acicular crystals. Non-pseudomorphous Malachite such as this was uncommon at Tsumeb. Ex. Carl Acosta collection.

TS181 - Cadmium Smithsonite sold

Tsumeb, Namibia
Small Cabinet - 6 x 3.5 x 2.5 cm

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Golden yellow rhombs of Smithsonite to 1.2cm wide. Good coverage of quality crystals in a less common color. Ex. Carl Acosta collection.

TS183 - Smithsonite $750 available

Tsumeb, Namibia
Miniature - 4.5 x 4.5 x 3 cm

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Fine and lustrous crystals of pink Smithsonite. Some of the crystals have a grey/black coloration along the very edges that looks as if a blow torch quickly passed over them. Rich colored undamaged crystals. Ex. Carl Acosta collection.

TS215 - Smithsonite $2,500 available

Tsumeb, Namibia
Thumbnail - 3.1 x 2.5 x 2.1 cm

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Large, sharp pink Smithsonite on matrix. Main crystals is 2.2cm across and pristine. Besides the large size, what stands out abouth these crystals is the transparency, much more so than normal, so clear you can see through to the matrix in areas. Good silky luster. Ex. Carl Acosta collection.

TS222 - Smithsonite sold

Tsumeb, Namibia
Miniature - 4.8 x 3.5 x 3 cm

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Pink crystals of Smithsonite on a dark sulfide matrix. Exceptionally well colored vivid crystals. The crystals are small translucent pink gems!! Ex. Carl Acosta collection.

TS230 - Azurite with Malachite after Azurite sold

Tsumeb, Namibia
Small Cabinet - 5.6 x 2.5 x 2 cm

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Highly colorful specimen of Azurite and Malachite after Azurite crystals on a bright yellow/green matrix. Ex. Carl Acosta collection.

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