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Rare Minerals

Sunday, 29 October 2023 03:00 PM

Introducing the "Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including agardite-(y), fluorapatite, and hutchinsonite and more from places like Bou Skour mine, Ourzazate prov., Morocco, Saxony, Germany, and Quiruvilca mine, Santiago de Chuco prov., La Libertad dept., Peru.

Agardite-(Y)

#62703
Locality
Bou Skour mine, Ourzazate prov., Morocco 
Formula
Cu2+6Y(AsO4)3(OH)6·3H2
Availability
Sold
Size
1.7 x 1.5 x 1 cm - Thumbnail 
Tagged
arsenate , copper  
Special Info
Type Locality 

Bluish green acicular crysatls in bunches to 1mm.


Agardite-(Y)

Formula
Cu2+6Y(AsO4)3(OH)6·3H2
Crystal System
Hexagonal 
Crystal Habit
Acicular, Rosette, Spherical 
Luster
Vitreous (Glassy) 
Color
blue green, blue 
Streak
greenish white 
Class
Hexagonal - Dipyramidal 
Hardness
3-4 
Special Info
Type Locality

Fluorapatite

with Fluorite - #BAC62682
Locality
Saxony, Germany 
Formula
Ca5(PO4)3
Availability
Available
Price
$40.00
Size
5 x 3.5 x 2.2 cm - Miniature 
Tagged
phosphate  

An old-timer specimen with an old number on it...(#469) if that means anything. The Fluorapatite is 7mm adjacent to a purple Fluorite crystal to 1.1cm. There are also numerous tiny Fluorapatite crystals scattered around matrix.


Fluorapatite

Formula
Ca5(PO4)3
Crystal System
Hexagonal 
Crystal Habit
Massive - Granular, Euhedral Crystals 
Cleavage
Indistinct, None, None 
Luster
Vitreous - Resinous 
Color
blue, brown, colorless, violet, green 
Streak
white 
Class
Hexagonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
Collection
William & Anne Cook Collection

Hutchinsonite

#CL62672
Locality
Quiruvilca mine, Santiago de Chuco prov., La Libertad dept., Peru 
Formula
PbTlAs5S9 
Availability
Available
Price
$50.00
Size
5.5 x 4 x 1.5 cm - Sm Cabinet 
Tagged
sulfide  

Deep deep red black-looking Hutchinsonite crystals to 4mm.


Hutchinsonite

Formula
PbTlAs5S9 
Crystal System
Orthorhombic 
Crystal Habit
Prismatic, Acicular 
Cleavage
Good, None, None 
Luster
Sub Metallic 
Color
cherry red, pink, black 
Streak
red 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
1.5-2 
Collection
Chet S. Lemanski, Jr. Collection

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