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Rare Tsumeb Mineral Specimens IV

Friday, 29 June 2018 07:00 PM

Introducing the "Rare Tsumeb Mineral Specimens IV" gallery which is part of our Special Edition galleries. This gallery contains mineral specimens for sale including krieselite, ludlockite, malachite, mimetite, and molybdofornacite and more from places like Tsumeb mine, Tsumeb, Namibia.

SOLD
Krieselite - 49251
Krieselite - 49251

Krieselite

#49251
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
Al2GeO4(OH)2 
Availability
Sold
Size
0.8 x 0.7 x 0.2 cm - Thumbnail 
Special Info
Type & Only Locality 

Krieselite is a  relatively new rare mineral from Tsumeb containing germanium. This specimen has tiny snow white crystals of Krieselite in an area less than 0.5mm. Comes with a Georg Gebhard label which states it is from the 46 level of the mine. Tsumeb is the type and only locality for this very rare germanium mineral. Tennantite matrix, small chip less than 1cm.


Krieselite

Formula
Al2GeO4(OH)2 
Crystal System
Orthorhombic 
Luster
Greasy (Oily) 
Color
beige, white 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Hardness
Special Info
Type & Only Locality

Ludlockite

with Leiteite - #48351
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
PbFe3+4As3+10O22 
Availability
Sold
Size
4 x 2 x 1.8 cm - Miniature 
Special Info
Type Locality 

Not actually sold but returned to Amo

Exceptional specimen of flaming reddish orange fibrous Ludlockite with associated silky white to Leiteite. Ludlockite occurs in two forms on this specimen: one, as thin bundles and radiating groups and two, as this deep red needledles to 5mm. 


Ludlockite

Formula
PbFe3+4As3+10O22 
Crystal System
Triclinic 
Crystal Habit
Acicular 
Cleavage
Good, Good, None 
Luster
Subadamantine 
Color
copper red 
Streak
light brown 
Class
Triclinic - Pinacoidal 
Fracture
Sectile 
Hardness
1.5-2 
Special Info
Type Locality

Malachite

#PD49249
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
Cu2CO3(OH)2 
Availability
Sold
Size
5 x 4 x 3.5 cm - Miniature 
Tagged
carbonate , copper  

Mass of arborescent Malachite.


Malachite

Formula
Cu2CO3(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Botryoidal, Stalactitic, Massive - Fibrous 
Cleavage
Perfect, Fair, None 
Luster
Vitreous - Silky 
Color
green, dark green, blackish green 
Streak
light green 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
3.5-4 
Collection
Don Phillips Collection
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Mimetite

#PD49253
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
Pb5(AsO4)3Cl 
Availability
Sold
Size
2.5 x 2.5 x 1 cm - Thumbnail 
Tagged
arsenate  

Prismatic crystals to 1.8cm with interesting yellow to red colors.


Mimetite

Formula
Pb5(AsO4)3Cl 
Crystal System
Hexagonal 
Crystal Habit
Reniform, Globular, Prismatic 
Cleavage
Imperfect, None, None 
Luster
Adamantine - Resinous 
Color
white, yellow, orange, brown, red 
Streak
white 
Class
Hexagonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 
Collection
Don Phillips Collection
Mineralpedia
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Previously Sold Mimetite
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Mimetite

with Cuprite - #PD49259
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
Pb5(AsO4)3Cl 
Availability
Sold
Size
7.5 x 4.5 x 4 cm - Sm Cabinet 
Tagged
arsenate  

Faint yellowish white acicular sprays of Mimetite to 5mm on Cuprite. Minor Wulfenite. Originally labelled as Leadhillite.


Mimetite

Formula
Pb5(AsO4)3Cl 
Crystal System
Hexagonal 
Crystal Habit
Reniform, Globular, Prismatic 
Cleavage
Imperfect, None, None 
Luster
Adamantine - Resinous 
Color
white, yellow, orange, brown, red 
Streak
white 
Class
Hexagonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 
Collection
Don Phillips Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Mimetite
On Dakota Matrix
Other Available Mimetite
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Mindat
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Molybdofornacite

with Dioptase - #49205
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
CuPb2MoO4AsO4(OH) 
Availability
Sold
Size
3 x 3 x 2 cm - Thumbnail 
Tagged
arsenate , copper  

Lime green glassy crystals of Molybdofornacite crystals in groups to about 0.75mm scattered in spongy matrix with minor Dioptase. Excellent scope specimen and rare. The green of the Molybdofornacite is a little greener and brighter than the crystals in-hand due to the digital process. They are still, however, a very stunning green.

Ex. William Pinch collection


Molybdofornacite

Formula
CuPb2MoO4AsO4(OH) 
Crystal System
Monoclinic 
Crystal Habit
Pistolitic, Lath 
Cleavage
None, None, None 
Luster
Adamantine 
Color
light green 
Streak
yellow 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
2-3 

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