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Mixed Minerals

Friday, 06 April 2018 08:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including kastningite, kosnarite, quartz, stibnite, and switzerite and more from places like Silbergrube, Waidhaus, Bavaria, Germany, Mount Mica quarry, Paris, Oxford Co., Maine, United States, Little Three mine, San Diego Co., California, United States, Wuning mine, Qingjiang, Wuning Co., Jiangxi prov., China, and Iron Knob, Eyre Peninsula, South Australia, Australia.

Kastningite

with Kingsmountite - #BN48680
Locality
Silbergrube, Waidhaus, Bavaria, Germany 
Formula
Mn2+Al2(PO4)2(OH)2·8H2
Availability
Available
Price
$75.00
Size
3 x 2.5 x 2.5 cm - Thumbnail 
Tagged
phosphate , pegmatite mineral  

Colorless, thin bladed crystals with fans of Kingsmountite. Both are very minute, less than 0.2mm. Kastningite is a rather rare phosphate thus far found exclusively in pegmatites at less than ten localities worldwide. Kingsmountite is also a rare phosphate.


Kastningite

Formula
Mn2+Al2(PO4)2(OH)2·8H2
Crystal System
Triclinic 
Crystal Habit
Thin, Tabular 
Luster
Vitreous (Glassy) 
Color
white, beige, colorless 
Streak
white 
Class
Triclinic - Pinacoidal 
Hardness
1-2 
Collection
Dr. Buford Nichols Collection

Kosnarite

#BN48676
Locality
Mount Mica quarry, Paris, Oxford Co., Maine, United States 
Formula
KZr2(PO4)3 
Availability
Available
Price
$150.00
Size
2.2 x 1.8 x 0.7 cm - Thumbnail 
Tagged
phosphate , pegmatite mineral  
Special Info
Type Locality 

Tiny blue pseudocubic rhombic crystals less than 0.3mm in a 1mm cluster.  Very rare zirconium phosohate found at only 5 worldwide localities. Type Locality.


Kosnarite

Formula
KZr2(PO4)3 
Crystal System
Trigonal 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, gray blue, light green 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Hardness
4.5 
Collection
Dr. Buford Nichols Collection
Special Info
Type Locality
Mineralpedia
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On Dakota Matrix
Previously Sold Kosnarite
On Dakota Matrix
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Quartz

with tourmaline - #48767
Locality
Little Three mine, San Diego Co., California, United States 
Formula
SiO2 
Availability
Available
Price
$175.00
Size
11 x 4 x 3.5 cm - Cabinet 
Tagged
pegmatite mineral  

Ex. London collection. A doubly terminated Quartz crystal with slight smoky color and included tourmaline. It is from the Hercules Dike.


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
Dr. David London Collection
Mineralpedia
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Stibnite

#RW48646
Locality
Wuning mine, Qingjiang, Wuning Co., Jiangxi prov., China 
Formula
Sb2S3 
Availability
Available
Price
$175.00
Size
11 x 9 x 4.5 cm - Cabinet 
Tagged
sulfide  

A tangled group of silvery, highly lustrous Stibnite crystals. The largest crystal is 6cm and there many crystals smaller. Very nice specimen.


Stibnite

Formula
Sb2S3 
Crystal System
Orthorhombic 
Crystal Habit
Prismatic, Striated, Granular 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
lead gray, bluish lead gray, steel gray, black 
Streak
blackish gray 
Class
Orthorhombic - Dipyramidal 
Fracture
Conchoidal 
Hardness
Collection
Robert J. Waidler Collection
Mineralpedia
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Switzerite

#BN48683
Locality
Iron Knob, Eyre Peninsula, South Australia, Australia 
Formula
Mn2+3(PO4)2·7H2
Availability
Available
Price
$50.00
Size
5.5 x 3.5 x 3.5 cm - Sm Cabinet 
Tagged
phosphate  

Silvery white thin platy crystals of Switzerite to 1mm. Very rich.


Switzerite

Formula
Mn2+3(PO4)2·7H2
Crystal System
Monoclinic 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
brown, pink 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
Collection
Dr. Buford Nichols Collection

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