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Rare Minerals

Saturday, 23 March 2019 12:00 PM

Introducing the "Rare Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including cerussite, schafarzikite, and uchucchacuaite and more from places like Greystones quarry, Lezant, Cornwall, England, Krížnica, Pernek, Malacky Co., Bratislava, Slovakia, and Inakuraishi mine, Furubira, Sapporo, Hokkaido, Japan.

Cerussite

#50331
Locality
Greystones quarry, Lezant, Cornwall, England 
Formula
PbCO3 
Availability
Sold
Size
6.5 x 7 x 2.5 cm - Sm Cabinet 
Tagged
carbonate  

Uncommon sulfur yellow crystals of Cerussite.


Cerussite

Formula
PbCO3 
Crystal System
Orthorhombic 
Crystal Habit
Reticulate, Massive - Granular, Crystalline - Coarse 
Cleavage
Distinct, Distinct, None 
Luster
Adamantine 
Color
colorless, white, gray, blue, green 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
3-3.5 
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Schafarzikite

with Kermesite - #50360
Locality
Krížnica, Pernek, Malacky Co., Bratislava, Slovakia 
Formula
Fe2+Sb3+2O4 
Availability
Available
Price
$95.00
Size
3 x 2.5 x 2.5 cm - Thumbnail 

Black prismatic, shiny Schafarzikite to 1mm with deep red sprays of Kermesite.


Schafarzikite

Formula
Fe2+Sb3+2O4 
Crystal System
Tetragonal 
Cleavage
Perfect, Good, None 
Luster
Metallic 
Color
red, reddish brown, yellow 
Streak
yellowish brown 
Class
Tetragonal - Ditetragonal Dipyramidal 
Hardness
3.5 

Uchucchacuaite

with Rhodochrosite - #50391
Locality
Inakuraishi mine, Furubira, Sapporo, Hokkaido, Japan 
Formula
AgMnPb3Sb5S12 
Availability
Available
Price
$295.00
Size
2.5 x 1.5 x 1.5 cm - Thumbnail 
Tagged
sulfide , silver  
Special Info
Microprobed 

This is a small 2cm specimen with mostly massive crystal grains of Uchucchacuaite to 2mm in Rhodochrosite matrix. The specimen comes with the polished microprobe disc/mount. 


Uchucchacuaite

Formula
AgMnPb3Sb5S12 
Crystal System
Orthorhombic 
Crystal Habit
Anhedral Grains, Twinning Common 
Luster
Metallic 
Color
lead gray 
Class
Orthorhombic - Dipyramidal 
Hardness
3.5 
Special Info
Microprobed

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