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0 item @ $0.00  

Mixed Minerals

Sunday, 04 September 2022 07:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including pyrite, quartz, rhodochrosite, and shigaite and more from places like Hidalgo del Parral, Chihuahua, Mexico, Black Cloud mine, Leadville, Lake Co., Colorado, United States, Treasury Tunnel, Ouray Co., Colorado, United States, Uchucchacua mine, Oyon prov., Lima dept., Peru, and N'Chwaning II mine, Kalahari Mn fields, Northern Cape Province, South Africa.

Pyrite

#59089
Locality
Hidalgo del Parral, Chihuahua, Mexico 
Formula
FeS2 
Availability
Sold
Size
10.5 x 6 x 7 cm - Cabinet 
Tagged
sulfide  

Brassy and lustrous Pyrite crystals with striations to 1cm.


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 
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Pyrite

on Siderite - #AH59100
Locality
Black Cloud mine, Leadville, Lake Co., Colorado, United States 
Formula
FeS2 
Availability
Sold
Size
13.5 x 13 x 3.5 cm - Cabinet 
Tagged
sulfide  

Large cabinet specimens of large creamy white Siderite crystals with hundreds of tiny Pyrite crystals. It is a good locality specimen.


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
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Quartz

and Calcite - #AH59162
Locality
Treasury Tunnel, Ouray Co., Colorado, United States 
Formula
SiO2 
Availability
Sold
Size
15 x 9 x 8 cm - Cabinet 

A large cabinet specimen of clear Quartz crystals to 5mm and light pink Calcite.


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
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Rhodochrosite

#59097
Locality
Uchucchacua mine, Oyon prov., Lima dept., Peru 
Formula
MnCO3 
Availability
Sold
Size
7 x 5 x 6 cm - Sm Cabinet 
Tagged
carbonate  

Light red, translucent Rhodochrosite crystals to 7mm on black marix.


Rhodochrosite

Formula
MnCO3 
Crystal System
Trigonal 
Crystal Habit
Massive - Granular, Columnar, Botryoidal 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
pinkish red, red, rose red, yellowish gray, brown 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle - Conchoidal 
Hardness

Rhodochrosite

#59137
Locality
Uchucchacua mine, Oyon prov., Lima dept., Peru 
Formula
MnCO3 
Availability
Sold
Size
2 x 1.4 x 1 cm - Thumbnail 
Tagged
carbonate  

Excellent, gemmy, deep red prismatic crystal.


Rhodochrosite

Formula
MnCO3 
Crystal System
Trigonal 
Crystal Habit
Massive - Granular, Columnar, Botryoidal 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
pinkish red, red, rose red, yellowish gray, brown 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle - Conchoidal 
Hardness

Shigaite

on Rhodochrosite - #59138
Locality
N'Chwaning II mine, Kalahari Mn fields, Northern Cape Province, South Africa 
Formula
NaAl3Mn2+6(SO4)2(OH)18·12H2
Availability
Sold
Size
3 x 1.5 x 0.4 cm - Thumbnail 

A 1mm red plate of Shigaite with numerous much smaller on pink Rhodochrosite.


Shigaite

Formula
NaAl3Mn2+6(SO4)2(OH)18·12H2
Crystal System
Trigonal 
Crystal Habit
Tabular, Hexagonal 
Cleavage
Perfect, Good, None 
Color
light yellow, orange 
Streak
yellow white 
Class
Trigonal - Rhombohedral 
Fracture
Flexible 
Hardness
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