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Mixed Minerals

Friday, 10 April 2020 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including acanthite, cassiterite, fluorite, perroudite, svabite, and torbernite and more from places like San Juan de Rayas mine, Guanajuato, Mexico, Imperial Clay, St. Austell, Cornwall, England, Blanchard mine, Socorro Co., New Mexico, United States, Cap Garonne mine, Le Pradet, Var, France, Franklin, Sussex Co., New Jersey, United States, and Musonoi mine, Kolwezi, Shaba Cu belt, Democratic Republic of Congo.

Acanthite

#BN51678
Locality
San Juan de Rayas mine, Guanajuato, Mexico 
Formula
Ag2
Availability
Available
Price
$95.00
Size
7 x 5 x 3 cm - Sm Cabinet 
Tagged
sulfide , silver  

This Acanthite covers an area of 5x2cm on Quartz matrix. All of it is essentially mal-formed crystals - thay are elongated with many cubic faces.


Acanthite

Formula
Ag2
Crystal System
Monoclinic 
Crystal Habit
Blocky, Skeletal, Arborescent 
Cleavage
poor to none 
Luster
Metallic 
Color
lead gray, gray, iron black 
Streak
shining black 
Class
Monoclinic - Prismatic 
Fracture
Sectile 
Hardness
2-2.5 
Collection
Dr. Buford Nichols Collection
Mineralpedia
View Acanthite
On Dakota Matrix
Previously Sold Acanthite
On Dakota Matrix
Other Available Acanthite
WebMineral
View Acanthite
Mindat
View Acanthite

Cassiterite

#AH52983
Locality
Imperial Clay, St. Austell, Cornwall, England 
Formula
SnO2 
Availability
Available
Price
$45.00
Size
7.5 x 4 x 4 cm - Sm Cabinet 
Tagged
tin  

Homely looking specimen, but makes a good locality specimen from Cornwall, a historic mining region which once supplied the world with tin. The Cassiterite crystals reach 6mm but most are formless and embedded in some kind of dark green chloritoid. Nonetheless, there are still a few good chocolate crystals. A nice hand written label with further detail accompanies the specimen. See prov. tab. The specimen was acquired by Hampson in 1962.


Cassiterite

Formula
SnO2 
Crystal System
Tetragonal 
Crystal Habit
Prismatic, Massive, Botryoidal 
Cleavage
Perfect, Indistinct, None 
Luster
Adamantine 
Color
brown, brownish black, colorless, green, gray 
Streak
brownish white 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Irregular 
Hardness
6-7 
Collection
Arnold G Hampson Collection

Fluorite

with Quartz - #AH53005
Locality
Blanchard mine, Socorro Co., New Mexico, United States 
Formula
CaF2 
Availability
Sold
Size
8.5 x 6 x 6 cm - Sm Cabinet 

Blue cubic crystals to 1.5cm on drusy Quartz matrix. Good coverage on backside also.


Fluorite

Formula
CaF2 
Crystal System
Isometric 
Crystal Habit
Crystalline - Coarse, Massive - Granular, Disseminated 
Cleavage
Three perfect, octahedral cleavages. 
Luster
Vitreous (Glassy) 
Color
purple, clear, yellow, green, red, blue 
Streak
white 
Geological Setting
Occurs in a wide range of geologic environments including low temperature Missississippi Valley lead-zinc deposits, hydrothermal gold deposits, Alpine cleft metamorphic environments  
Class
Isometric - Hexoctahedral 
Fracture
Uneven 
Hardness
Collection
Arnold G Hampson Collection
Mineralpedia
View Fluorite
On Dakota Matrix
Previously Sold Fluorite
On Dakota Matrix
Other Available Fluorite
WebMineral
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Mindat
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Perroudite

#AH52995
Locality
Cap Garonne mine, Le Pradet, Var, France 
Formula
Ag4Hg5S5(I,Br)2Cl2 
Availability
Available
Price
$65.00
Size
5 x 2.5 x 3 cm - Miniature 
Tagged
silver  

One little, less than 1mm, red acicular sprays of the very rare silver-mercury halide.


Perroudite

Formula
Ag4Hg5S5(I,Br)2Cl2 
Crystal System
Orthorhombic 
Crystal Habit
Acicular, Aggregates, Prismatic 
Cleavage
Perfect, None, None 
Luster
Vitreous - Adamantine 
Color
light red 
Streak
orange red 
Class
Orthorhombic - Disphenoidal 
Fracture
Brittle - Irregular 
Hardness
Collection
Arnold G Hampson Collection

Svabite

with Rhodonite - #BC52647
Locality
Franklin, Sussex Co., New Jersey, United States 
Formula
Ca5(AsO4)3
Availability
Available
Price
$3,500.00
Size
8.5 x 7 x 6.5 cm - Sm Cabinet 
Tagged
arsenate  

The two large, hexagonal, prismatic crystals at the center are Svabite and has been microprobed (Bart Cannon, 1999) by Forrest Cureton. The longest is 6cm and the shorter crystal is 3cm. There are also a few 2.5cm crystals. The color is consistent with the description.  There are also eight pink Rhodonite crystals of which the longest is 2.5cm. Fluorescent photos shown are Calcite (orange glow) and Willemite (green). On the side is a stuck on label. Granular garnet is rich and most associated with the Rhodonite.

Ex. Earl Calvert collection, Rock Currier. Several previous labels accompany the specimen, please see provenance tab.

Incredible specimen, one of which should be in the collection of any serious Franklin collector.


Svabite

Formula
Ca5(AsO4)3
Crystal System
Hexagonal 
Crystal Habit
Crystalline - Poor, Hexagonal 
Cleavage
Indistinct, None, None 
Luster
Vitreous - Resinous 
Color
colorless, gray, gray green, yellowish white 
Streak
white 
Class
Hexagonal - Dipyramidal 
Fracture
Brittle 
Hardness
4-5 
Collection
Barbara Cureton Collection
On Dakota Matrix
Previously Sold Svabite
On Dakota Matrix
Other Available Svabite
WebMineral
View Svabite
Mindat
View Svabite

Torbernite

#53016
Locality
Musonoi mine, Kolwezi, Shaba Cu belt, Democratic Republic of Congo 
Formula
Cu(UO2)2(PO4)2·12H2
Availability
Available
Price
$35.00
Size
6 x 4 x 2.5 cm - Sm Cabinet 
Tagged
phosphate  
Special Info
Radioactive!! 

Bright green platy crystals covering much of matrix.


Torbernite

Formula
Cu(UO2)2(PO4)2·12H2
Crystal System
Tetragonal 
Crystal Habit
Tabular, Earthy, Foliated 
Cleavage
Perfect, Distinct, None 
Luster
Vitreous - Pearly 
Color
green, grass green, leek green, apple green, siskin green 
Streak
pale green 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Brittle 
Hardness
2-2.5 
Collection
Don Phillips Collection
Special Info
Radioactive!!

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