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locality for more information. |
12918:
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Lawsonite and Muscovite (variety Fuchsite)
- $25
Reed Station, Tiburon Uplands Nature Preserve, Marin
County, California
8.5 x 5.7 x 3.1 cm (3.3 x 2.2 x 1.2 inches)
Specimen status: Available Click
here to order
An intergrown mass of deep green, shining
fuchsite flakes and light grayish lawsonsite crystals. Although the
lawsonites are mostly incomplete, the specimen is notable for the
association (classic for the locality) and the rarity of lawsonite.
Lawsonite is a calcium-aluminum sorosilicate, CaAl2(Si2O7)(OH)2
. H2O, for which Reed Station is the
type locality. An old label indicates the specimen was collected in
1960.
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14701:
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Metatorbernite
Pine Mountain, Mitchell County, North Carolina
3.9 x 3.1 x 2.0 cm (1.5 x 1.2 x 0.8 inches)
Specimen status: Sold
Opaque, micaceous, green metatorbernite
flakes lying flat on a quartz/feldspar matrix. Individual crystals
reach 3 mm along the crystal edge. Highly typical for the species at
this locality.
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9107:
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Calcite pseudomorph after Glauberite - $12
Camp Verde, Camp Verde District, Yavapai County,
Arizona
6.3 x 4.5 x 3.3 cm (2.5 x 1.8 x 1.3 inches)
Specimen status: Available Click
here to order
A cluster of opaque but sharp calcite
crystals, pseudomorphed after glauberite. The calcites have a surface
texture like unglazed porcelain and reach 4 cm along the edge of the
largest individual crystal. Many of these classic pseudomorphs are
labeled as being gypsum when in fact they are calcite. This is a
particularly good, undamaged example.
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9291:
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Aragonite and Quartz
Monte Cristo Mine, Rush Creek District, Marion County,
Arkansas
6.3 x 6.3 x 4.2 cm (2.5 x 2.5 x 1.7 inches)
Specimen status: Sold
A cluster of colorless, transparent to
translucent quartz crystals hosts an overgrowth of off-white, opaque
aragonite blossoms, like a small coral reef. Displays well without need
for a stand. No damage.
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9344:
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Orpiment - $45
Ormea, Tanaro Valley, Cuneo Province, Piedmont, Italy
7.4 x 6.0 x 2.9 cm (2.9 x 2.4 x 1.1 inches)
Specimen status: Available Click
here to order
A flat plate of nearly parallel,
chisel-pointed, orange-brown, translucent orpiment crystals on a mixed
sulfides matrix. Individual orpiment crystals reach 1.4 cm in length.
Except for a few, scattered rubs (expected with a mineral this soft),
the specimen is free of damage. A fine Italian orpiment for the price.
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9534:
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Sphalerite, Chalcopyrite, Arsenopyrite, and
Calcite - $25
Huaron Mining District, Alcides Carrión
Province, Pasco Department, Peru
6.4 x 6.0 x 2.1 cm (2.5 x 2.4 x 0.8 inches)
Specimen status: Available Click
here to order
A flat plate of sharply crystalline
sphalerite hosts a scattering of chalcopyrite, arsenopyrite, and
calcite crystals. The sphalerite is black, highly lustrous, and opaque.
The chalcopyrite is bright and brassy, with most of the crystals being
intergrown with the sphalerite but otherwise incomplete. Also present
are a few small arsenopyrites, and on one face, a dusting of colorless,
lightly frosted, translucent calcites. Scattered edgewear, difficult to
find under magnification, but otherwise no damage to this interesting
assemblage.
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9780:
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Lazulite
Graves Mountain, Lincoln County, Georgia
7.3 x 5.1 x 4.7 cm (2.9 x 2.0 x 1.9 inches)
Specimen status: Sold
A rich collection of opaque, blue
lazulite bipyramidal crystals on matrix. Individual crystals reach 7 mm
across. Many are terminated and even doubly terminated. At least one
{100} twin is present. Very typical for the species from this locality.
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9842:
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Albite and Microcline - $14
Minas
Gerais, Brazil
5.4 x 4.2 x 2.8 cm (2.1 x 1.7 x 1.1 inches)
Specimen status: Available Click
here to order
This feldspar combination specimen
features tabular microcline crystals sitting on a microcline crystal
matrix. The albites are mostly sharp, colorless and translucent, and
reach 2.2 cm across. The microcline is complete (except on two faces
where removed from the host rock), opaque, off-white, with a surface
like unglazed porcelain.
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12454:
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Barite (variety Sand Barite)
Lake Thunderbird area, Norman, Cleveland County,
Oklahoma
5.6 x 4.9 x 3.1 cm (2.2 x 1.9 x 1.2 inches)
Specimen status: Sold
A wonderfully sharp example of
sand-included barite (a 'barite rose'). Aesthetic and free from damage,
a fine example from the classic barite rose locality.
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