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Rare & Systematic Minerals

Sunday, 07 May 2023 04:00 PM

Introducing the "Rare & Systematic Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including graeserite, and schieffelinite and more from places like Gorb, Lärchultini, Binntal, Wallis, Switzerland, and Grand Central mine, Tombstone, Cochise Co., Arizona, United States.

Graeserite

#BAC61615
Locality
Gorb, Lärchultini, Binntal, Wallis, Switzerland 
Formula
Fe4Ti3AsO13(OH) 
Availability
Available
Price
$75.00
Size
3 x 1.5 x 0.8 cm - Thumbnail 
Special Info
Type Locality 

Tiny 1mm and less acicular crystals throughout specimen. Graeserite is a rare titanium mineral with arsenic and found only in three places in the world.


Graeserite

Formula
Fe4Ti3AsO13(OH) 
Crystal System
Monoclinic 
Crystal Habit
Acicular, Radial, Aggregates 
Cleavage
Distinct, None, None 
Luster
Metallic 
Color
black 
Streak
black 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
5.5 
Collection
William & Anne Cook Collection
Special Info
Type Locality

Schieffelinite

#BAC61626
Locality
Grand Central mine, Tombstone, Cochise Co., Arizona, United States 
Formula
PbTeO4·H2
Availability
Available
Price
$150.00
Size
1.4 x 1.4 x 1 cm - Thumbnail 
Tagged
tellurium  
Special Info
Type Locality 

White Schieffelinite with green Rodalquilarite. Very rare.


Schieffelinite

Formula
PbTeO4·H2
Crystal System
Orthorhombic 
Crystal Habit
Platy, Scaly 
Cleavage
Good, None, None 
Luster
Adamantine 
Color
colorless, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Hardness
Collection
William & Anne Cook Collection
Special Info
Type Locality

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