Marin Mineral
Mixed Minerals
September 25, 2019  ·  17 specimens

K456 - Quartz on Fluorite  sold

Cave-in-Rock, Hardin Co., Illinois, USA
Large Cabinet - 16 x 12 x 8.5 cm



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Quartz on Fluorite Quartz on Fluorite Quartz on Fluorite Quartz on Fluorite Quartz on Fluorite Quartz on Fluorite

Large color-zoned Fluorite with attached Quartz crystals. Big and showy, it's also nearly pristine, I could only fine one tiny edge chip. The out layer is purple with an inner lavender/pink coloration. The Quartz crystals are spinkled on all sides and reach 2.5cm in size, some double-terminated.


K454 - Prehnite epimorph after Anhydrite  sold

Djouga Diggings, Diakon, Kayes Region, Mali
Small Cabinet - 7.4 x 5.5 x 5 cm



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Prehnite epimorph after Anhydrite Prehnite epimorph after Anhydrite Prehnite epimorph after Anhydrite Prehnite epimorph after Anhydrite

Velvety green Prehnite that formed over (now gone) Anhydrite crystals, leaving this rare and wonderful specimen. Transluscent and undamaged. The inside shows the flat, smooth surfaces of 3 former Anhydrite crystals.


K477 - Variscite  sold

Ribeirao Cascalheira, Mato Grosso, Brazil
Small Cabinet - 6 x 4.5 x 4 cm



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Variscite Variscite Variscite

Two spherical clusters of Variscite crystals in a vug in Quartz. I obtained this specimen from dealer Steve Perry about 20 years ago during a visit to his home following one of his many trips to Brazil. This was the best of his specimens, with better color and sparkle than the rest. Variscite is usually found in massive form, rarely as crystals.


K450 - Fluorite  sold

Cave-in-Rock, Hardin Co., Illinois, USA
Cabinet - 11 x 7 x 4 cm



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Fluorite Fluorite Fluorite Fluorite

Large color-zoned Fluorite specimen with cubes to 4.3cm on edge. Big and showy, in great condition with just a few small edge chips. The out layer is purple with an inner light lavender/pink coloration.


K465 - Prehnite  sold

Merelani Hills, Arusha, Tanzania
Small Cabinet - 5.5 x 4 x 3.2 cm



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Prehnite Prehnite Prehnite

Oval shaped group of Prehnite crystals that radiate out from the center. A translucent mass of solid crystals, this is one of the finest specimens from a large lot of recently mined and purchased Prehnite specimens from the Merelani Tanzanite mines. The base is naturally smooth and flat where it grew against a Calcite crystal. The larger crystals appear to have grown from a central sphere of Prehnite. Like nearly all of these, there are a couple nicked crystals, but regardless, it's a really good one.


K464 - Prehnite  sold

Merelani Hills, Arusha, Tanzania
Small Cabinet - 5.5 x 5.5 x 2.2 cm



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Prehnite Prehnite Prehnite

Rosette shaped groups of translucent yellow Prehnite crystals. Great color and large crystals, this is one of the finest specimens from a large lot of recently mined and purchased Prehnite specimens from the Merelani Tanzanite mines. The back smooth and flat where it grew against Graphite. It's pristine except for light chipping along the top edge and a partial Tanzanite crystal intergrown in the lower right side.


K463 - Prehnite  sold

Merelani Hills, Arusha, Tanzania
Miniature - 4.5 x 4 x 3.5 cm



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Prehnite Prehnite Prehnite Prehnite

Rosette shaped group of translucent yellow Prehnite crystals. Great color and large crystals, this is one of the finest specimens from a large lot of recently mined and purchased Prehnite specimens from the Merelani Tanzanite mines. The main rosette is 4cm tall and sits nearly vertically for display. The larger crystals appear to have grown from a central sphere of Prehnite. The bottom is somewhat flat where it grew against Graphite. It's pristine except for light chipping on some crystals and a contacted backside.


K400 - Silver in Calcite  sold

Cobalt, Ontario, Canada
Large Cabinet - 19 x 9.5 x 2.3 cm



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Silver in Calcite Silver in Calcite Silver in Calcite

Thick, heavy vein section of Silver in Calcite, a 2.3cm thick slab sawcut on both sides. There is a layer of solid Silver along the more straight edge, with the rest of the specimen filled with more dendritic Silver. Visually, it appears to be 40-50% Silver, and by weight, a much larger percentage. The specimen is quite hefty and was the best slab (richest, largest, thickest) out a large lot of Cobalt Silver I purchased from a Canadian miner over 20 years ago.


K419 - Lawsonite  sold

Reed Station, Marin Co., California, USA
Cabinet - 10 x 10 x 4.5 cm



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Lawsonite Lawsonite Lawsonite Lawsonite Lawsonite

Rare blue/grey Lawsonite crystals to 1.5cm embedded in Glaucophane schist. Good sized, rich specimen from the type locality for Lawsonite.


K471 - Lawsonite  sold

Reed Station, Marin Co., California, USA
Small Cabinet - 5.5 x 4 x 4 cm



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Lawsonite Lawsonite Lawsonite

Rare blue/grey Lawsonite crystals to 1.5cm embedded in Glaucophane schist. The main crystal is sharply formed and exposed fromt he schist on both sides. This is the single best example I've had and was in my collection for 20 years. From the type locality for Lawsonite.


K229 - Pyrite  sold

Huanzala Mine, Huanuco Dept., Peru
Miniature - 4 x 4 x 4 cm



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Pyrite Pyrite Pyrite Pyrite

Large, striated single cube with smaller crystals attached to the surface. This is a beautiful example and comes with an old Roberts Minerals label. Ken and Rosemary Roberts had great taste in minerals, and whenever I find of their old specimens, they usually stand out.


K470 - Rose Quartz  sold

Pitorra Mine, Minas Gerais, Brazil
Miniature - 4 x 4 x 1.5 cm



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Rose Quartz Rose Quartz Rose Quartz

Cluster of well formed Rose Quartz crystals atop a partial white Quartz crystal. Comes with an old label showing a price of $350.


K410 - Emerald gemstone  sold

Colombia
Thumbnail - 1 x 0.9 x 0.6 cm



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Emerald gemstone Emerald gemstone Emerald gemstone Emerald gemstone

Faceted Colombian Emerald weighing 3.60 carats.


K478 - Peridot  sold

Pyaung Gaung, Mogok, Myanmar (Burma)
Thumbnail - 2.7 x 0.8 x 0.5 cm



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Peridot Peridot Peridot Peridot

Gem Peridot crystal from Mogok, known for the finest Peridot in the world. These are seldom seen and much less common than Pakistani Peridot crystals. Like many from the locality it has a dimpled surface and internally transparent. It's also crudely double-terminated.


K472 - Covellite  sold

Butte, Silver Bow Co., Montana, USA
Thumbnail - 2.8 x 1.4 x 1.2 cm



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Covellite Covellite Covellite

Irridescent blades of Covellite on a Quartz crystal coated matrix. The Covellite crystals reach 1cm in size.


K468 - Albite on Tourmaline  sold

Stak Nala, Skardu, Pakistan
Miniature - 4.2 x 2.8 x 1.5 cm



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Albite on Tourmaline Albite on Tourmaline Albite on Tourmaline Albite on Tourmaline

Rosette of Albite attached tothe base of a single Tourmaline crystal. The Tourmaline is well terminated and grades up from a dark green to a light green to a blue termination. The blue color is uncommon for Stak Nala and very nice.


K474 - Dioptase  sold

Tantara Mine, Congo
Small Cabinet - 6 x 5 x 2.5 cm



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Dioptase Dioptase Dioptase

Cluster of large Dioptase crystals that grew atop the tips of Calcite crystals (now gone). The Dioptase crystals reach 1.8cm in size and are undamaged.


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