Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Posnjakite from
Tsumeb Mine (Ongopolo Mine), Tsumeb, Oshikoto Region, Namibia


06228620017364284212587.jpg
Posnjakite, etc.

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
02208110017272011449790.jpg
Posnjakite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
05100810017272011452586.jpg
Posnjakite, etc.

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
00770530017677425709231.jpg
Posnjakite, etc.

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
06228620017364284212587.jpg
Posnjakite, etc.

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
00544250017364284223513.jpg
Posnjakite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
05100810017272011452586.jpg
Posnjakite, etc.

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
00770530017677425709231.jpg
Posnjakite, etc.

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
07760080017364284227775.jpg
Posnjakite, etc.

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
02208110017272011449790.jpg
Posnjakite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
05100810017272011452586.jpg
Posnjakite, etc.

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
03664770017677425882284.jpg
Posnjakite, etc.

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
Locality type:Mine
Classification
Species:Posnjakite
Formula:Cu4(SO4)(OH)6 · H2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Tennantite Subgroup12
Malachite9
Cerussite7
Linarite5
Anglesite4
Langite3
Devilline2
Galena2
Enargite1
Beaverite-(Cu)1
Wulfenite1
Serpierite1
Data
Mineral Data:Click here to view Posnjakite data
Locality Data:Click here to view Tsumeb Mine (Ongopolo Mine), Tsumeb, Oshikoto Region, Namibia
Photo GalleryView Gallery (4 photos)
Data Identifiers
Mindat Occurrence Record ID:13397
Long-form Identifier:1:3:13397:3
GUID (UUID V4):0
References
Gebhard, Georg (1999) Tsumeb Vol. 2 - A Unique Mineral Locality - Tsumeb. GG Publishing. p.1-328.
 
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