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Tsumeb Mineral Specimens III

Friday, 27 November 2015 08:00 AM

A fresh load of rarities from Tsumeb!

Bayldonite

#DS43257
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
Cu3PbO(AsO3OH)2(OH)2 
Availability
Sold
Size
7 x 2.5 x 4.5 cm - Sm Cabinet 
Tagged
arsenate , copper  

Bright lime green microcrystalline Bayldonite after probable Mimetite crystals. The former being hollowed out. Perhaps this should be analyzed as there is a possibility it may be sulfate containing Arsentsumebite.


Bayldonite

Formula
Cu3PbO(AsO3OH)2(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Encrustations, Mammillary, Druse 
Cleavage
None, None, None 
Luster
Greasy (Oily) 
Color
grass green, yellow green, dark green 
Streak
green 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
4.5 
Collection
Shultz Collection

Betpakdalite-Camg

#38371
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
[Ca2(H2O)17Mg(H2O)6][Mo8As2Fe33+O36(OH)] 
Availability
Sold
Size
0.7 x 0.4 x 0.4 cm - Thumbnail 
Special Info
Type Locality 
Special Info
XRD Confirmed 
Special Info
EDS Confirmed 

A beautiful relatively new IMA mineral forming Bright orange octahedral crystals to about 0.3mm with Scorodite.  Though small this specimen is excellent and packed with crystals. Betpakdalite-Ca,Mg is a relatively new IMA mineral forming  Overall the specimen measures about 7x4x4mm.


Betpakdalite-Camg

Formula
[Ca2(H2O)17Mg(H2O)6][Mo8As2Fe33+O36(OH)] 
Special Info
Type Locality
Special Info
XRD Confirmed
Special Info
EDS Confirmed
SOLD
Biehlite - 38386
Biehlite - 38386

Biehlite

#38386
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
Sb3+2MoO6 
Availability
Sold
Size
1.5 x 1.5 x 1 cm - Thumbnail 
Special Info
Type Locality 
Special Info
XRD Confirmed 
Special Info
EDS Confirmed 
Special Info
Type Material 

White acicular group of Biehlite. This is the type and only locality thus far reported. The specimen was taken off of the type specimen - see Gebhard's label in prov. tab. This is from the type specimen.


Biehlite

Formula
Sb3+2MoO6 
Crystal System
Monoclinic 
Crystal Habit
Fibrous 
Luster
Vitreous - Silky 
Color
white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Flexible 
Hardness
1-1.5 
Special Info
Type Locality
Special Info
XRD Confirmed
Special Info
EDS Confirmed
Special Info
Type Material
Mineralpedia
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Cerussite

w/ Smithsonite & Galena - #PD34830
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
PbCO3 
Availability
Sold
Size
6 x 6 x 4 cm - Sm Cabinet 
Tagged
carbonate  

A 6mm brownish Cerussite crystals on colorless rhombs of Smithsonite.


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 
Collection
Phillips Collection
Mineralpedia
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Cerussite

#PD40680
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
PbCO3 
Availability
Sold
Size
4 x 3.5 x 3 cm - Miniature 
Tagged
carbonate  

Single crystal, showing about half of a sixling twinned crystal.


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 
Collection
Phillips Collection
Mineralpedia
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Cerussite

#DS43254
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
PbCO3 
Availability
Sold
Size
5 x 3 x 3.5 cm - Miniature 
Tagged
carbonate  

A nicely reticulated Cerussite crystals to 2.5cm across.


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 
Collection
Shultz Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Cerussite
On Dakota Matrix
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Mindat
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