Marin Mineral
Tanzanian Gem Crystals
August 23, 2023  ·  15 specimens

AU863 - Aquamarine  sold

Songea, Ruvuma Region, Tanzania
Cabinet - 10 x 3.2 x 2.7 cm



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Aquamarine Aquamarine Aquamarine

Unusual, large single Aquamarine crystal from Songea. It has a wonderful mottled coloration of blues, whites, browns. Complete all around with uniform shape and smooth flat crystal faces.


AU845 - Tanzanite  sold

Merelani Hills, Arusha, Tanzania
Thumbnail - 1.7 x 1.5 x 0.8 cm



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Tanzanite Tanzanite Tanzanite Tanzanite

One of the most unusual Tanzanites I've ever owned. A colorless crystal with a zone of aqua blue/green.


AU867 - Feldspar var. Moonstone  sold

Namalulu, Tanzania
Small Cabinet - 8.5 x 3.5 x 3 cm



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Feldspar var. Moonstone Feldspar var. Moonstone Feldspar var. Moonstone Feldspar var. Moonstone

New find of crystallized moonstone from Tanzania. Individual crystals to 5cm that display a satiny blue color when turned under lighting. This 'Schiller effect' of color is seen at different angles on the different crystals. These have been found here in the past, but this new find has much higher quality, porcelain-like lustrous crystals than those found previously. Moonstone crystals are rare!


AU864 - Feldspar var. Moonstone with Tourmaline  sold

Namalulu, Tanzania
Miniature - 5 x 5 x 2.5 cm



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Feldspar var. Moonstone with Tourmaline Feldspar var. Moonstone with Tourmaline Feldspar var. Moonstone with Tourmaline

New find of crystallized moonstone from Tanzania. This specimen has bits of brown Dravite Tourmaline attached. Individual crystals to 3.8cm that display a satiny blue color when turned under lighting. This 'Schiller effect' of color is seen at different angles on the different crystals. These have been found here in the past, but this new find has much higher quality, porcelain-like lustrous crystals than those found previously. Moonstone crystals are rare!


LP680 - Spinel  sold

Mahenge, Morogoro, Tanzania
Thumbnail - 2.3 x 2.3 x 2 cm



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Spinel Spinel Spinel Spinel

Single octahedral pink Spinel crystal from Tanzania. Has 5 good terminations with the bottom tip missing. Good color with areas of transparency.


LP743 - Spinel   $150  available

Mahenge, Morogoro, Tanzania
Miniature - 3.5 x 3 x 2.8 cm



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Spinel Spinel Spinel Spinel

Large red octahedral Spinel crystal in white marble with golden mica.

AU605 - Spinel   $275  available

Mahenge, Morogoro, Tanzania
Thumbnail - 2.3 x 2 x 1.5 cm



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Spinel Spinel Spinel Spinel

Complete single octahedral red Spinel crystal in white marble. Translucent and 1.6cm wide.

AU607 - Spinel   $275  available

Mahenge, Morogoro, Tanzania
Thumbnail - 2.5 x 2.5 x 1.8 cm



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Spinel Spinel Spinel Spinel

GLassy octahedral pink to red Spinel crystals in white marble. Great color with areas of transparency.

LP759 - Diopside (etched)   $180  available

Merelani Hills, Arusha, Tanzania
Thumbnail - 2.8 x 2.1 x 1.6 cm



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Diopside (etched) Diopside (etched) Diopside (etched) Diopside (etched)

Glassy green Diopside crystal with natural etched surface growth from the Merelani Tanzanite mines. Complete all around and internally transparent.

AU667 - Prehnite  sold

Merelani Hills, Arusha, Tanzania
Miniature - 4.5 x 3.5 x 3 cm



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Prehnite Prehnite Prehnite Prehnite Prehnite

Large, toothy crystals of Prehnite forming a rounded cluster that is complete all the way around with just a bit of attached Graphite. As far a crystallized Prehnite goes (not botryoidal), these are some of the best in the world. This is an excellent example with great form, large crystals, and good translucency and color.


FM103 - Spessartine  sold

Nani, Loliondo, Tanzania
Thumbnail - 1.1 x 1 x 0.9 cm



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Spessartine Spessartine Spessartine Spessartine

Complete orange Spessartine crystal from recent small scale mining at this locality. A complete crystal with excellent transparency.


FM104 - Spessartine   $200  available

Nani, Loliondo, Tanzania
Thumbnail - 1.8 x 1.5 x 1.5 cm



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Spessartine Spessartine Spessartine Spessartine

Sharp orange Spessartine crystal from recent small scale mining at this locality. A complete crystal with slightly oblong form. Undamaged.

FM105 - Spessartine   $250  available

Nani, Loliondo, Tanzania
Thumbnail - 1.8 x 1.8 x 1.5 cm



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Spessartine Spessartine Spessartine

Gemmy orange Spessartine crystal from recent small scale mining at this locality. A complete crystal with good color and gem zones. Minor edge chipping, otherwise undamaged.

FM107 - Spessartine  sold

Nani, Loliondo, Tanzania
Thumbnail - 2.2 x 2.2 x 2 cm



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Spessartine Spessartine Spessartine

Gemmy orange Spessartine crystal from recent small scale mining at this locality. A complete crystal with good color and gem zones. Minor edge chipping, otherwise undamaged.


AU859 - Spessartine  sold

Nani, Loliondo, Tanzania
Miniature - 4 x 4 x 3.5 cm



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Spessartine Spessartine Spessartine Spessartine

Large, gemmy orange Spessartine crystal from recent small scale mining at this locality. A nearly complete crystal with damage at the bottom, otherwise complete all around. Weighs 400 carats with gem rough value.


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