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Mixed Minerals

Friday, 09 October 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 malachite, parnauite, pyrite, pyromorphite, pyroxmangite, and quartz and more from places like Humbot mine, Cochise Co., Arizona, United States, Cap Garonne mine, Le Pradet, Var, France, Mountain Springs mine, Rico dist., Dolores Co., Colorado, United States, Broken Hill, New South Wales, Australia, Sunnyside mine, Silverton, San Juan Co., Colorado, United States, and Jefferson Co., Montana, United States.

Malachite

ps after Cuprite - #AH54220
Locality
Humbot mine, Cochise Co., Arizona, United States 
Formula
Cu2CO3(OH)2 
Availability
Sold
Size
3 x 3 x 3.5 cm - Miniature 
Tagged
carbonate , copper  

1mm Cuprite crystals replaced by Malachite.


Malachite

Formula
Cu2CO3(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Botryoidal, Stalactitic, Massive - Fibrous 
Cleavage
Perfect, Fair, None 
Luster
Vitreous - Silky 
Color
green, dark green, blackish green 
Streak
light green 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
3.5-4 
Collection
Arnold G Hampson Collection
Mineralpedia
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Previously Sold Malachite
On Dakota Matrix
Other Available Malachite
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Parnauite

with Cornwallite - #AH53570
Locality
Cap Garonne mine, Le Pradet, Var, France 
Formula
Cu9(AsO4)2(SO4)(OH)10·7H2
Availability
Available
Price
$35.00
Size
2 x 2.1 x 1.8 cm - Thumbnail 
Tagged
arsenate , copper  

Micro, thin, plates of Parnauite in rosette-like groups.


Parnauite

Formula
Cu9(AsO4)2(SO4)(OH)10·7H2
Crystal System
Orthorhombic 
Crystal Habit
Rosette, Scaly, Encrustations 
Cleavage
Good, None, None 
Color
blue green, green, light blue 
Streak
greenish white 
Class
Orthorhombic - Disphenoidal 
Hardness
Collection
Arnold G Hampson Collection
Mineralpedia
View Parnauite
On Dakota Matrix
Previously Sold Parnauite
On Dakota Matrix
Other Available Parnauite
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Mindat
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Pyrite

#AH54061
Locality
Mountain Springs mine, Rico dist., Dolores Co., Colorado, United States 
Formula
FeS2 
Availability
Sold
Size
8 x 5 x 4.5 cm - Sm Cabinet 
Tagged
sulfide  

Large vug with good, striated Pyrite crystals to 9mm.


Pyrite

Formula
FeS2 
Crystal System
Isometric 
Crystal Habit
Striated, Druse, Stalactitic 
Cleavage
Poor, Poor, None 
Luster
Metallic 
Color
pale brass yellow 
Streak
greenish black 
Class
Isometric - Diploidal 
Fracture
Conchoidal 
Hardness
6.5 
Collection
Arnold G Hampson Collection
Mineralpedia
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Previously Sold Pyrite
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Pyromorphite

#BC52629
Locality
Broken Hill, New South Wales, Australia 
Formula
Pb5(PO4)3Cl 
Availability
Available
Price
$225.00
Size
8 x 6 x 4.5 cm - Sm Cabinet 
Tagged
phosphate  

Galena with a hollowed vug totally lined with brown, thin Pyromorphite crystals to 6mm. 


Pyromorphite

Formula
Pb5(PO4)3Cl 
Crystal System
Hexagonal 
Crystal Habit
Crystals short to long prismatic, acicular, often hoppered terminations, rarely tabular to equant; radiating to branching groups, tapering to a point. Commonly rounded, globular, reniform, botryoidal. 
Cleavage
On {1011}, interrupted 
Luster
Resinous to subadamantine 
Color
Dark grass-green, green, yellow, yellow-orange, reddish orange, yellow-brown, brown, tan, grayish, may be colorless 
Streak
White 
Geological Setting
A secondary mineral in the oxidized zone of lead deposits 
Class
Hexagonal, 6/m - Dipyramidal 
Fracture
Uneven to subconchoidal 
Hardness
3.5–4 
Collection
Barbara Cureton Collection

Pyroxmangite

with Chalcopyrite & Sphalerite - #AH54060
Locality
Sunnyside mine, Silverton, San Juan Co., Colorado, United States 
Formula
Mn2+SiO3 
Availability
Sold
Size
9 x 5 x 4 cm - Sm Cabinet 
Tagged
ore mineral  

This is a terrific ore specimen and study piece. Formerly thought to be Rhodonite the pink vein has been redescribed as Pyroxmangite. The remainder of the specimen is Quartz with the sulfides Chalcopyrite and Sphalerite. If you study ore paragenesis or simply enjoy Colorado sulfides and lode deposits, this is for you.


Pyroxmangite

Formula
Mn2+SiO3 
Crystal System
Triclinic 
Crystal Habit
Massive, Massive - Granular 
Cleavage
Perfect, Perfect, None 
Luster
Vitreous - Pearly 
Color
pink, rose pink, purplish pink, yellowish red brown, brown 
Streak
white 
Class
Triclinic - Pinacoidal 
Hardness
5.5-6 
Collection
Arnold G Hampson Collection

Quartz

var. amethyst - #54216
Locality
Jefferson Co., Montana, United States 
Formula
SiO2 
Availability
Sold
Size
6 x 5 x 1.5 cm - Sm Cabinet 

Neat specimen crowned by excellent amethyst crystals to 1.1cm on a plate of white Quartz.


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
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On Dakota Matrix
Previously Sold Quartz
On Dakota Matrix
Other Available Quartz
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Mindat
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