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12021:
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Andradite
Quartzite Mountain, Stanley District, Graham County,
Arizona
14.5 x 11.0 x 7.4 cm (5.7 x 4.3 x 2.9 inches)
Specimen status: Sold
A group of golden-green, opaque andradite
garnet crystals on matrix. Individual crystal reach 1.8 cm across. Very
typical for the locality. Sits easily for display without a stand as
shown in the first picture. Could benefit from some trimming, probably
by saw. A few small dings, but no significant damage.
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14635:
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Adamite - $10
Ojuela Mine, Mapimí, Mun. de Mapimí,
Durango, Mexico
5.1 x 4.2 x 2.7 cm (2.0 x 1.7 x 1.1 inches)
Specimen status: Available Click
here to order
Light golden-yellow, glassy, translucent
adamite crystals on limonite matrix. Individual crystals reach 7 mm.
Very little shortwave UV fluorescence for this specimen. A few small
areas with contacted and/or incomplete crystals, but no significant
damage. This rich specimen sits well for display as shown without a
stand.
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1237:
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Köttigite and Gypsum
Ojuela Mine, Mapimí, Mun. de Mapimí,
Durango, Mexico
9.0 x 7.1 x 2.2 cm (4.5 x 2.8 x 0.9 inches)
Specimen status: Sold
This specimen features a rich carpet of
opaque, deep green köttigite
sprays, accented with numerous translucent to transparent, colorless
gypsum rhombohedra. The köttigite
sprays rise to 3-4 mm above the matrix, and the gypsum crystals max out
at 12 mm. Köttigite is a
fairly rare hydrated zinc arsenate, Zn3(AsO4)2
· 8H2O, found in quantity only at the Ojuela Mine.
The association with gypsum is even rarer. Except for a few tiny scuffs
to the gypsum crystals, this fine specimen has no damage.
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9953:
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Sphalerite and Calcite - $30
Elmwood Mine, Carthage, Smith County, Tennessee
5.1 x 4.8 x 3.3 cm (2.0 x 1.9 x 1.3 inches)
Specimen status: Available Click
here to order
A deep orange-brown, translucent to
opaque cluster of sphalerite crystals, accented by a cascade of tiny,
colorless calcite crystals long one face. The sphalerite luster is
superbly bright and glassy. One bald area near the back of the
specimen, but otherwise free of damage. Sits well for display as shown
without need for a stand.
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11102:
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Sphalerite, Galena, and Ankerite
New Jersey Zinc Eagle Mine, Gilman District, Eagle
County, Colorado
7.8 x 7.1 x 2.1 cm (3.1 x 2.8 x 0.8 inches)
Specimen status: Sold
A flat plate with interesting stuff on
both faces. One face features a rich carpet of opaque, black and highly
lustrous sphalerite crystals that reach about 6 mm. Also present are a
few galena cubes, that largest of which is 8 mm across its edge. The
other display face also has a good coverage of sphalerite, this time
accented with flattened, opaque, sandy ankerite rhombohedra that reach
1 cm across. A few small galena crystals and some pyrite also present
on this face. This is a neat mineral association species, typical for
this once-productive locality. No damage.
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11314:
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Atacamite, Pseudomalachite, Chrysocolla,
and
Quartz
La
Farola Mine, Cerro Pintado, Las Pintadas District, Tierra Amarilla,
Copiapó Province, Chile
6.1 x 5.0 x 3.1 cm (2.4 x 2.0 x 1.2 inches)
Specimen status: Sold
This specimen features deep green,
transparent to opaque, lustrous atacamite needles and blades (to about
2 mm) lie flat on, and rise up from, matrix. Sandwiched between the
atacamite and matrix are patches of small, transparent quartz crystals
with scattered, blue chrysocolla inclusions. There are also patches of
pseudomalachite as submillimeter blue-green balls. The bright, patchy, accenting color
combination is aesthetic. The
atacamite adds some sparkle as well. No damage.
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11999:
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Galena and Sphalerite - $125
Galena, Picher Field, Tri-State District, Cherokee
County, Kansas
11.3 x 8.0 x 7.7 cm (4.4 x 3.1 x 3.0 inches)
Specimen status: Available Click
here to order
A chert matrix features a cluster of
galena cubes, prompting one person to call this specimen the Borg Cube
Junkyard. The galena cubes have some luster, with complex, somewhat
stepped faces, and edges that reach 3.7 cm. Small octahedral corner
modifications are present on some of the galena crystals. Minor black
sphalerite also present. Displays very nicely at several angles without
need for a stand. No damage.
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12023:
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Fluorite and Sphalerite - $22
Cave-in-Rock, Cave-in-Rock Sub-District, Illinois -
Kentucky Fluorspar District, Hardin County, Illinois
20.5 x 9.0 x 5.3 cm (8.1 x 3.5 x 2.1 inches)
Specimen status: Sold
This specimen, which sits as shown
without need for a stand, features two bands of translucent to opaque
fluorite cubes. Individual fluorite crystals reach 1.2 cm along the
crystal edge. Many have been abused by nature (naturally corroded),
while a few have suffered abuse by men (small bruises and cleaves).
Also present are numerous dull brown to black sphalerite crystals; of
these maybe half of the smaller ones are complete. So this is not the
prettiest specimen, but it is typical for some of the material found in
the Cave-in-Rock district.
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12028:
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Fluorite and Calcite - $24
Cave-in-Rock, Cave-in-Rock Sub-District, Illinois -
Kentucky Fluorspar District, Hardin County, Illinois
10.4 x 8.0 x 6.7 cm (4.1 x 3.1 x 2.6 inches)
Specimen status: Available Click
here to order
A group of mostly translucent fluorite
crystals decorated with colorless, mostly translucent calcite
scalohedra. The largest of the fluorite crystals - the specimen's base
plate - is nearly complete (save for a few dings and cleaves). The
bottom appears to have cleaved at some point, and then been etched a
bit. As is common among fluorites, color depends upon the light source:
this specimen shows different shades of purple under daylight
fluorescent lighting (used for the pictures you see here) compared to
under xenon lighting. The calcites are fluorescent. Also not the prettiest specimen, but also
typical for some of the material found in the Cave-in-Rock district.
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