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0 item @ $0.00  

Mixed Rare Minerals

Friday, 19 July 2019 06:00 PM

Introducing the "Mixed Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including baksanite, goethite, and montgomeryite and more from places like Tyrnyauz Mo-W deposit, Baksan Valley, Kabardino-Balkarian, N. Caucasus, Russia, Restormel Iron mine, St. Austell district, Cornwall, England, and Tip Top mine, Custer Co., South Dakota, United States.

Baksanite

#50388
Locality
Tyrnyauz Mo-W deposit, Baksan Valley, Kabardino-Balkarian, N. Caucasus, Russia 
Formula
Bi6Te2S3 
Availability
Available
Price
$125.00
Size
3 x 2 x 1 cm - Thumbnail 
Tagged
sulfide , tellurium  
Special Info
Type Locality 

A four locality mineral. Small 1mm metallic grain. Ex. Anatoly Kasatkin.


Baksanite

Formula
Bi6Te2S3 
Crystal System
Trigonal 
Luster
Metallic 
Color
steel gray 
Class
Trigonal - Hexagonal Scalenohedral 
Hardness
1.5-2 
Special Info
Type Locality

Goethite

#51030
Locality
Restormel Iron mine, St. Austell district, Cornwall, England 
Formula
FeO(OH) 
Availability
Available
Price
$50.00
Size
7.5 x 6 x 4.5 cm - Sm Cabinet 

Radial and concentrically color zoned Goethite cross-sections on Quartz.


Goethite

Formula
FeO(OH) 
Crystal System
Orthorhombic 
Crystal Habit
Acicular, Reniform, Radial 
Cleavage
Perfect, Distinct, None 
Luster
Adamantine - Silky 
Color
brown, reddish brown, yellowish brown, brownish yellow, ocher yellow 
Streak
yellowish brown 
Class
Orthorhombic - Dipyramidal 
Fracture
Hackly 
Hardness
5-5.5 
Mineralpedia
View Goethite
On Dakota Matrix
Previously Sold Goethite
On Dakota Matrix
Other Available Goethite
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Mindat
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Montgomeryite

with Whitlockite - #51020
Locality
Tip Top mine, Custer Co., South Dakota, United States 
Formula
Ca4MgAl4(PO4)6(OH)4·12H2
Availability
Available
Price
$225.00
Size
8.5 x 5 x 2.5 cm - Sm Cabinet 
Tagged
phosphate , pegmatite mineral  

Bright red bladed Montgomeryite crystals to 0.75mm in large groups giving that astonding red color. There is no other red Montgomeryite occurence that I know of, how about you? Whitlockite is associated with it as lilac groups.


Montgomeryite

Formula
Ca4MgAl4(PO4)6(OH)4·12H2
Crystal System
Monoclinic 
Cleavage
Perfect, Indistinct, None 
Luster
Vitreous (Glassy) 
Color
colorless, yellowish, white, green, red 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness

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