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0 item @ $0.00  

Mixed Minerals

Thursday, 07 February 2019 08:00 AM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including novacekite, pyrite, segnitite, shigaite, sinkankasite, and stringhamite and more from places like Animas mine, Francisco Portillo, Santa Eulalia dist., Chihuahua, Mexico, Huanzala mine, Huallanca dist., Huánuco, Peru, San Rafael mine, Nye Co., Nevada, United States, N'Chwaning I mine, Kalahari Mn fileds, Northern Cape Province, South Africa, Barker-Ferguson mine, Pennington Co., South Dakota, United States, and Commercial quarry, Crestmore, Riverside Co., California, United States.

Novacekite

with Aragonite - #50206
Locality
Animas mine, Francisco Portillo, Santa Eulalia dist., Chihuahua, Mexico 
Formula
Mg(UO2)2(AsO4)2·12H2
Availability
Available
Price
$95.00
Size
5 x 4.5 x 3.5 cm - Miniature 

Rich specimen with canary yellow tabular crystals of Novacekite to 2mm and sharp, colorless Aragonite.


Novacekite

Formula
Mg(UO2)2(AsO4)2*12(H2O) 
Crystal System
Tetragonal 
Cleavage
Perfect, Indistinct, Indistinct 
Luster
Vitreous (Glassy) 
Color
light yellow, straw yellow 
Streak
yellow white 
Class
Tetragonal - Dipyramidal 
Hardness
2.5 

Pyrite

#37022
Locality
Huanzala mine, Huallanca dist., Huánuco, Peru 
Formula
FeS2 
Availability
Sold
Size
6.5 x 4 x 4 cm - Sm Cabinet 
Tagged
sulfide  

Excellent large pyritohedrons to 1.5cm.


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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Segnitite

with Carminite & Mimetite - #50169
Locality
San Rafael mine, Nye Co., Nevada, United States 
Formula
PbFe3+3(AsO4)(AsO3OH)(OH)6 
Availability
Sold
Size
5 x 5 x 4 cm - Miniature 
Tagged
arsenate  

There is a lot going on in this specimen with yellow, sugary Segnitite, colorless, good crystals of Mimetite and micro Carminite.


Segnitite

Formula
PbFe3+3(AsO4)(AsO3OH)(OH)6 
Crystal System
Trigonal 
Cleavage
Good, None, None 
Luster
Adamantine 
Color
greenish brown, yellow brown 
Streak
light yellow 
Class
Trigonal - Hexagonal Scalenohedral 
Hardness
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Shigaite

on Rhodochrosite - #50198
Locality
N'Chwaning I mine, Kalahari Mn fileds, Northern Cape Province, South Africa 
Formula
NaAl3Mn2+6(SO4)2(OH)18·12H2
Availability
Sold
Size
3 x 2 x 1 cm - Thumbnail 

A beautiful deep flashy red Shigaite crystal to 7mm across on 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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Sinkankasite

#49915
Locality
Barker-Ferguson mine, Pennington Co., South Dakota, United States 
Formula
Mn2+Al(PO3OH)2(OH)·6H2
Availability
Sold
Size
4 x 3 x 1 cm - Miniature 
Tagged
phosphate , pegmatite mineral  
Special Info
Type Locality 

Colorless, long bladed micro crystals to 1.5.


Sinkankasite

Formula
Mn2+Al(PO3OH)2(OH)·6H2
Crystal System
Triclinic 
Crystal Habit
Pseudomorphous 
Cleavage
Good, Parting, None 
Luster
Vitreous - Dull 
Color
colorless, white 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Brittle 
Hardness
Special Info
Type Locality
SOLD
Stringhamite - 50179
Stringhamite - 50179

Stringhamite

#50179
Locality
Commercial quarry, Crestmore, Riverside Co., California, United States 
Formula
CaCuSiO4·H2
Availability
Sold
Size
5 x 4 x 2 cm - Miniature 
Tagged
copper  

Purplish blue Stringhamite, no crystals.


Stringhamite

Formula
CaCuSiO4·H2
Crystal System
Monoclinic 
Crystal Habit
Aggregates 
Cleavage
Good, Imperfect 
Luster
Vitreous (Glassy) 
Color
azure, blue violet, dark blue 
Streak
light blue 
Class
Monoclinic - Prismatic 
Hardness

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