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Rare & Systematic Minerals

Friday, 07 February 2020 09:00 PM

Introducing the "Rare & Systematic Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including marthozite, metahewettite, mixite, moraesite, pellyite, and quartz and more from places like Musonoi mine, Kolwezi, Shaba Cu belt, Democratic Republic of Congo, Monument #2 mine, Apache Co., Arizona, United States, Mammoth mine, Tintic dist., Juab Co., Utah, United States, Pomarolli mine, Linopolis, Divino das Laranjereiras, Minas Gerais, Brazil, Esquire #8 claim, Big Creek, Fresno Co., California, United States, and Cathedral Rock, Ravalli Co., Montana, United States.

SOLD
Marthozite - DP52299
Marthozite - DP52299

Marthozite

with Guilleminite - #DP52299
Locality
Musonoi mine, Kolwezi, Shaba Cu belt, Democratic Republic of Congo 
Formula
Cu2+(UO2)3(Se4+O3)2O2·8H2
Availability
Sold
Size
2.5 x 2.5 x 2 cm - Thumbnail 
Tagged
copper , selenium  
Special Info
Radioactive!! 

Olive green platy crystals to 1.5mm with yellow acicular crystals, less than 0.5mm and pulverulent coatings of Guillleminite. Excellent rare specimen.


Marthozite

Formula
Cu2+(UO2)3(Se4+O3)2O2·8H2
Crystal System
Orthorhombic 
Crystal Habit
Bladed 
Cleavage
Perfect, Indistinct, None 
Color
greenish brown, yellow green 
Class
Orthorhombic - Pyramidal 
Hardness
Collection
Don Phillips Collection
Special Info
Radioactive!!

Metahewettite

with Steigerite(?) - #AH52241
Locality
Monument #2 mine, Apache Co., Arizona, United States 
Formula
CaV5+6O16·3H2
Availability
Sold
Size
8 x 4 x 3.5 cm - Sm Cabinet 
Tagged
vanadium  

Red fibrous Metahewettie with yellow platy Steigerite(?).


Metahewettite

Formula
CaV5+6O16·3H2
Crystal System
Monoclinic 
Luster
Silky 
Color
red 
Streak
brownish red 
Class
Monoclinic - Prismatic 
Hardness
Collection
Arnold G Hampson Collection
SOLD
Mixite - 35587
Mixite - 35587

Mixite

#35587
Locality
Mammoth mine, Tintic dist., Juab Co., Utah, United States 
Formula
Cu2+6Bi(AsO4)3(OH)6·3H2
Availability
Sold
Size
3.5 x 3 x 2 cm - Miniature 
Tagged
arsenate , copper  

Superb green, acicular sprays to 3mm across.


Mixite

Formula
Cu2+6Bi(AsO4)3(OH)6·3H2
Crystal System
Hexagonal 
Crystal Habit
Acicular, Radial, Encrustations 
Luster
Adamantine 
Color
blue green, yellow green, white, light blue, light green 
Streak
pale green 
Class
Hexagonal - Dipyramidal 
Fracture
Uneven 
Hardness
3.5-4 
Mineralpedia
View Mixite
On Dakota Matrix
Previously Sold Mixite
On Dakota Matrix
Other Available Mixite
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Moraesite

#49509
Locality
Pomarolli mine, Linopolis, Divino das Laranjereiras, Minas Gerais, Brazil 
Formula
Be2PO4(OH)·4H2
Availability
Sold
Size
3.5 x 3.5 x 2.5 cm - Miniature 
Tagged
phosphate , beryllium , pegmatite mineral  

Excellent rich specimen with fuzzy, pure white crystals of very rare Moraesite in-between Muscovite blades.


Moraesite

Formula
Be2PO4(OH)·4H2
Crystal System
Monoclinic 
Crystal Habit
Spherical, Druse, Encrustations 
Cleavage
Perfect, None, None 
Color
white 
Streak
white 
Class
Monoclinic 
Hardness
Mineralpedia
View Moraesite
On Dakota Matrix
Previously Sold Moraesite
On Dakota Matrix
Other Available Moraesite
WebMineral
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Mindat
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Pellyite

with Gillespite - #42234
Locality
Esquire #8 claim, Big Creek, Fresno Co., California, United States 
Formula
Ba2CaFe2+2Si6O17 
Availability
Sold
Size
4 x 2.5 x 2.5 cm - Miniature 

One thick 6mm vein of translucent brown Pellyite with red crystal grains of Gillespite to 2mm. Rare. Four localities worldwide.


Pellyite

Formula
Ba2CaFe2+2Si6O17 
Crystal System
Orthorhombic 
Crystal Habit
Massive 
Cleavage
Indistinct, Indistinct, None 
Luster
Vitreous (Glassy) 
Color
colorless, light yellow 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness
Mineralpedia
View Pellyite
On Dakota Matrix
Previously Sold Pellyite
On Dakota Matrix
Other Available Pellyite
WebMineral
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Mindat
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Quartz

var. Smoky - #49462
Locality
Cathedral Rock, Ravalli Co., Montana, United States 
Formula
SiO2 
Availability
Available
Price
$40.00
Size
7 x 2.3 x 1.8 cm - Sm Cabinet 

A single very dark brown quartz crystal to 7cm. A great specimen from Chris van Laer's collection. Chris was a fantastic field collector in Montana and Idaho.


Quartz

Formula
SiO2 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Druse, Crystalline - Fine 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
brown, colorless, violet, gray, yellow 
Streak
white 
Class
Trigonal - Trapezohedral 
Fracture
Conchoidal 
Hardness
Collection
Chris van Laer Collection
Mineralpedia
View Quartz
On Dakota Matrix
Previously Sold Quartz
On Dakota Matrix
Other Available Quartz
WebMineral
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Mindat
View Quartz

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