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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Nacrite from
Kellogg Mine (Confederate Mine; German shaft; Welldiggen claim), North Little Rock, Pulaski County, Arkansas, USA


07759460017368219368353.jpg
Nacrite, etc.

Kellogg Mine, North Little Rock, Pulaski County, Arkansas, USA
07759460017368219368353.jpg
Nacrite, etc.

Kellogg Mine, North Little Rock, Pulaski County, Arkansas, USA
00319680017272033098448.jpg
Nacrite, etc.

Kellogg Mine, North Little Rock, Pulaski County, Arkansas, USA
Locality type:Mine
Classification
Species:Nacrite
Formula:Al2(Si2O5)(OH)4
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Sphalerite2
Data
Mineral Data:Click here to view Nacrite data
Locality Data:Click here to view Kellogg Mine (Confederate Mine; German shaft; Welldiggen claim), North Little Rock, Pulaski County, Arkansas, USA
Data Identifiers
Mindat Occurrence Record ID:925989
Long-form Identifier:1:3:925989:8
GUID (UUID V4):0
References
J. Lawrence Smith (1867) On a new locality of Tetrahedrite, Tennantite, and Nacrite, with some account of the Kellogg Mines of Arkansas. The American Journal of Science and Arts, Vol. 93
 
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