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12177:
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Quartz (variety Amethyst) and Calcite
Capurru Quarry, Sassari Province, Sardinia, Italy
7.2 x 6.0 x 5.1 cm (2.8 x 2.4 x 2.0 inches)
Specimen status: Sold
Fine amethyst crystals rise to 1.1 cm
above a carpet of small, white calcite crystals, all in a cleft on
matrix. No damage. This locality is said to have produced the finest
Italian amethyst.
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13563:
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Rhodizite-Londonite - $40
Tetezantsio pegmatites, Tetezantsio-Andoabatokely
Pegmatite Field, Betafo District, Antananarivo Province, Madagascar
9.6 x 7.5 x 6.7 cm (3.8 x 3.0 x 2.6 inches)
Specimen status: Available Click
here to order
A large but incomplete, opaque yellow
rhodizite-londonite crystal on a tourmaline-rich matrix. It is not
possible to differentiate between the rhodizite, the potassium-rich end
member of the series, (K,Cs)Al4Be4(B,Be)12O28,
and londonite, the cesium-rich end member of the series, (Cs, K, Rb)Al4Be4(B,Be)12O28 by visual inspection alone.
Notable for the size of the crystal.
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13845:
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Uvite and Quartz - $32
Power's Farm, Pierrepont, St Lawrence County, New York
10.4 x 7.3 x 4.7 cm (4.1 x 2.9 x 1.9 inches)
Specimen status: Available Click
here to order
From the classic New York uvite locality
coves this intergrown group of jet black, lustrous uvite crystals with
a quartz pocket along one edge. Individual uvite crystals reach 2.6 cm.
A few broken and contact points are seen, but the specimen is notable
for the large mass of uvite it contains.
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14613:
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Mimetite and Wulfenite - $14
Ojuela Mine, Mapimí, Mun. de Mapimí,
Durango, Mexico
9.1 x 7.1 x 1.9 cm (3.6 x 2.8 x 0.7 inches)
Specimen status: Available Click
here to order
A nearly flat, somewhat spongy plate of
tiny green mimetite crystals hosts a few opaque, orange wulfenite
crystals. The wulfenites have a truncated, elongated bipyramidal (boxy)
shape and reach 3 mm.
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14614:
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Mimetite and Wulfenite - $14
Ojuela Mine, Mapimí, Mun. de Mapimí,
Durango, Mexico
6.2 x 4.9 x 4.3 cm (2.4 x 1.9 x 1.7 inches)
Specimen status: Available Click
here to order
This specimen consists mostly of tiny,
green mimetite crystals with some limonite matrix. Scattered about the
clefts and vugs are opaque, truncated,
elongated bipyramidal (boxy) shape wulfenite crystals that reach about 3 mm
in length.
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14615:
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Wulfenite and Mimetite - $40
Ojuela Mine, Mapimí, Mun. de Mapimí,
Durango, Mexico
8.0 x 4.5 x 3.1 cm (3.1 x 1.8 x 1.2 inches)
Specimen status: Available Click
here to order
A carpet of tiny, green mimetite crystals
is decorated with a generous collection of orange-brown, opaque
wulfenite crystals. The wulfenites are elongated, truncated bipyramids
(giving them a boxy appearance), and reach 7 mm in length. A few
crystals missing along the edges, but no significant damage is noted.
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8045:
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Wulfenite
Jianshan Mine, Ruoqiang County, Bayin'gholin
Autonomous Prefecture, Xinjiang Autonomous Region, China
3.5 x 2.8 x 1.6 cm (1.4 x 1.1 x 0.6 inches)
Specimen status: Sold
A cluster of tabular, deep brick red
wulfenite crystals. The wulfenites range from translucent to opaque,
and reach 7 mm along the crystal edge. The crystals are lustrous along
the edges, whereas most of the broad faces are frosted. As is common
for wulfenites below a few hundred dollars from this locality, a few
crystals are incomplete.
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8383:
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Dioptase and Calcite
Arizona
5.9 x 4.2 x 1.5 cm (2.3 x 1.7 x 0.6 inches)
Specimen status: Sold
A flat plate of matrix covered on both
sides with a rich crust of brilliant, blue-green dioptase
microcrystals. The dioptase is covered with a layer of colorless
calcite, lending some sparkle. Another dealer's label which accompanies
the specimen gives the locality as "Sunnyville, Arizona", but no such
place exists. Probably from the Christmas
Mine.
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8393:
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Aurichalcite, Smithsonite, and Hemimorphite
- $20
79 Mine, Banner District, Gila County, Arizona
5.3 x 4.0 x 3.2 cm (2.1 x 1.6 x 1.3 inches)
Specimen status: Available Click
here to order
Clefts in matrix are lined with bright
blue aurichalcite needles, which reach about 5 mm in length. In one
spot the aurichalcite is accompanied by small, water-clear, terminated
hemimorphite blades. Another cleft is lines with small, pale green
rice-grain smithsonite crystals, accompanied by an aurichalcite spray.
A nice association specimen.
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8650:
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Smithsonite
Santa Eulalia District, Mun. de Aquiles Serdán,
Chihuahua, Mexico
6.0 x 3.9 x 2.1 cm (2.4 x 1.5 x 0.8 inches)
Specimen status: Sold
A nearly flat plate of matrix, covered
with two generations of smithsonite. The bottom layer is greenish and
botryoidal (visible along the right edge of the specimen in the second
picture), while the second generation is a light blue and more foliated
in appearance. No damage.
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