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Mixed Minerals

Sunday, 11 July 2021 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including kunatite, malachite, marcasite, microcline, mosesite, and petzite and more from places like Krásno, Horní Slavkov, Bohemia, Czech Republic, Shilu mine, Yangchun Co., Guangdong Province, China, Emperius mine, Creede, Mineral Co., Colorado, United States, Organ dist., Dona Ana Co., New Mexico, United States, Terlingua dist., Brewster Co., Texas, United States, and Rex mine, Boulder Co., Colorado, United States.

Kunatite

with Krasnoite - #PD50697
Locality
Krásno, Horní Slavkov, Bohemia, Czech Republic 
Formula
CuFe3+2(PO4)2(OH)2·4H2
Availability
Sold
Size
3.5 x 2 x 2 cm - Miniature 
Tagged
phosphate , copper  

Green waxy looking rare Kunatite.


Kunatite

Formula
CuFe3+2(PO4)2(OH)2·4H2
Crystal System
Monoclinic 
Class
Monoclinic - Prismatic 
Hardness
Collection
Don Phillips Collection
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Previously Sold Kunatite
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Malachite

#AH55951
Locality
Shilu mine, Yangchun Co., Guangdong Province, China 
Formula
Cu2CO3(OH)2 
Availability
Sold
Size
9 x 8 x 1.5 cm - Sm Cabinet 
Tagged
carbonate , copper  

Botryoidal Malachite, dull.


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
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Mindat
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Marcasite

with Galena - #56071
Locality
Emperius mine, Creede, Mineral Co., Colorado, United States 
Formula
FeS2 
Availability
Sold
Size
7 x 5 x 3 cm - Sm Cabinet 
Tagged
sulfide  

Sulfide specimen with a band of Marcasite 3mm thick encompassing Galena.


Marcasite

Formula
FeS2 
Crystal System
Orthorhombic 
Crystal Habit
Tabular, Stalactitic, Globular 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
bronze, light brass yellow, tin white 
Streak
gray brownish black 
Class
Orthorhombic - Dipyramidal 
Fracture
Uneven 
Hardness
6-6.5 
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Microcline

#52590
Locality
Organ dist., Dona Ana Co., New Mexico, United States 
Formula
KAlSi3O8 
Availability
Available
Price
$300.00
Size
8 x 5 x 6 cm - Sm Cabinet 
Tagged
pegmatite mineral  

I'm not sure what to make of this piece, simply it is set of light pink Microcline twinned crystals.


Microcline

Formula
KAlSi3O8 
Crystal System
Triclinic 
Crystal Habit
Blocky, Crystalline - Coarse, Prismatic 
Cleavage
Perfect, Good, None 
Luster
Vitreous (Glassy) 
Color
bluish green, green, gray, grayish yellow, yellowish 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Uneven 
Hardness
Collection
Barbara Cureton Collection

Mosesite

#55930
Locality
Terlingua dist., Brewster Co., Texas, United States 
Formula
Hg2N(Cl,SO4,MoO4,CO3)·H2
Availability
Sold
Size
5 x 4 x 3 cm - Miniature 
Special Info
Type Locality 

Lemon yellow 1mm crystals with Calcite. Also present is possibly dark orange Terlinguacreekite.


Mosesite

Formula
Hg2N(Cl,SO4,MoO4,CO3)·H2
Crystal System
Isometric 
Crystal Habit
Cubic Crystals 
Cleavage
Indistinct, None, None 
Luster
Adamantine 
Color
yellow, light green, olive green 
Streak
light yellow 
Class
Isometric - Hextetrahedral 
Fracture
Brittle - Uneven 
Hardness
3-4 
Special Info
Type Locality
Mineralpedia
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Petzite

with Gold - #RW48510
Locality
Rex mine, Boulder Co., Colorado, United States 
Formula
Ag3AuTe2 
Availability
Sold
Size
4 x 3 x 3 cm - Miniature 
Tagged
tellurium , silver , gold  

This is a great specimen with rusty Gold in a cavity and is not readily recognized. The Petzite occurs as dark silvery cubes to a little over 1mm. One set of Petzite crystals has Pyrite crystals on top. Another area shows one cube to about 1mm. Very nice piece with perhaps a few more minerals such as Acanthite.


Petzite

Formula
Ag3AuTe2 
Crystal System
Isometric 
Crystal Habit
Massive, Granular 
Cleavage
None, None, None 
Luster
Metallic 
Color
iron black, steel gray 
Streak
grayish black 
Class
Isometric - Gyroidal 
Fracture
Brittle - Sectile 
Hardness
2.5 
Mineralpedia
View Petzite
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Previously Sold Petzite
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Mindat
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