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Mixed Minerals

Sunday, 24 June 2018 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including arsenopyrite, arthurite, azurite, belloite, bermanite, and calcite and more from places like San Rafael mine, Nye Co., Nevada, United States, Majuba Hill mine, Pershing Co., Nevada, United States, Morenci mine, Greenlee Co., Arizona, United States, La Vendida mine, Sierra Gorda dist., Antofagasta, Chile, Sapucaia mine, Galileia, Doce valley, Minas Gerais, Brazil, and Charcas, San Luis Potosi, Mexico.

Arsenopyrite

with Quartz - #24571
Locality
San Rafael mine, Nye Co., Nevada, United States 
Formula
FeAsS 
Availability
Available
Price
$25.00
Size
5.5 x 5 x 3 cm - Sm Cabinet 
Tagged
sulfide  

A locality specimen but not too shabby for any locality. Perched on top is a group of fine, striated, short prismatic Arsenopyrite crystals with chisel shaped ends. The group is 10mm.


Arsenopyrite

Formula
FeAsS 
Crystal System
Monoclinic 
Crystal Habit
Striated, Euhedral Crystals, Prismatic 
Cleavage
one distinct 
Luster
Metallic 
Color
tin white, light steel gray 
Streak
black 
Geological Setting
Widespread. Most commonly found in medium to high temperature veins.  
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
5.5 to 6 

Arthurite

with Olivenite - #49302
Locality
Majuba Hill mine, Pershing Co., Nevada, United States 
Formula
CuFe3+2(AsO4)2(OH)2·4H2
Availability
Sold
Size
6.5 x 4 x 6 cm - Sm Cabinet 
Tagged
arsenate , copper  

Green balls of radiating Arthurite crystals to 1mm with bladed olive green Olivenite and blue Cornwallite(?). Very nice specimen.


Arthurite

Formula
CuFe3+2(AsO4)2(OH)2·4H2
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Acicular, Spherical 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
apple green, emerald green 
Streak
light green 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
3-4 
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Azurite

with Malachite - #RW48696
Locality
Morenci mine, Greenlee Co., Arizona, United States 
Formula
Cu3(CO3)2(OH)2 
Availability
Available
Price
$65.00
Size
6.5 x 5 x 2.5 cm - Sm Cabinet 
Tagged
carbonate , copper  

3-7mm deep blue lustrous Azurite crystals intergrown with spherical groups of pastal green Malachite.


Azurite

Formula
Cu3(CO3)2(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Tabular, Prismatic, Stalactitic 
Cleavage
Perfect, Fair, None 
Luster
Vitreous (Glassy) 
Color
azure blue, blue, light blue, dark blue 
Streak
light blue 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 
Collection
Robert J. Waidler Collection
Mineralpedia
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Belloite

on Paratacamite - #BN49294
Locality
La Vendida mine, Sierra Gorda dist., Antofagasta, Chile 
Formula
Cu(OH)Cl 
Availability
Sold
Size
4 x 2.5 x 3 cm - Miniature 
Tagged
copper  

Grass green waxy patches with Paratacamite. Rich. Rare.


Belloite

Formula
Cu(OH)Cl 
Crystal System
Monoclinic 
Crystal Habit
Encrustations 
Luster
Vitreous (Glassy) 
Color
yellowish green, olive green 
Streak
yellowish green 
Class
Monoclinic - Prismatic 
Hardness
1-2 
Collection
Dr. Buford Nichols Collection
On Dakota Matrix
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Bermanite

with Strengite - #BN49236
Locality
Sapucaia mine, Galileia, Doce valley, Minas Gerais, Brazil 
Formula
Mn2+Mn3+2(PO4)2(OH)2·4H2
Availability
Sold
Size
3.5 x 2 x 1.5 cm - Miniature 
Tagged
phosphate , pegmatite mineral  

A beautiful specimen, though small, of beady purple Strengite and flashy rusty red Bermanite.


Bermanite

Formula
Mn2+Mn3+2(PO4)2(OH)2·4H2
Crystal System
Monoclinic 
Cleavage
Perfect, Indistinct, None 
Luster
Vitreous - Resinous 
Color
light red, dark reddish brown 
Class
Monoclinic - Sphenoidal 
Fracture
Brittle 
Hardness
3.5 
Collection
Dr. Buford Nichols Collection
Mineralpedia
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Calcite

#BN49275
Locality
Charcas, San Luis Potosi, Mexico 
Formula
CaCO3 
Availability
Sold
Size
8.5 x 6 x 3 cm - Sm Cabinet 
Tagged
carbonate  

Pseudohexagonal Calcite crystals to 1.5cm in a large cluster.  This is what was called "Pokerchip Calcite".


Calcite

Formula
CaCO3 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Stalactitic, Massive 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
colorless, white, pink, yellow, brown 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle - Conchoidal 
Hardness
Collection
Dr. Buford Nichols Collection
Mineralpedia
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