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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Gypsum from
Clay pit Nelskamp (Breitscheid clay pit), Breitscheid, Ratingen, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany


06918260017271986817536.jpg
Gypsum

Clay pit Nelskamp, Breitscheid, Ratingen, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany
09115050017272075613311.jpg
Gypsum

Clay pit Nelskamp, Breitscheid, Ratingen, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany
02365270017370323934486.jpg
Gypsum

Clay pit Nelskamp, Breitscheid, Ratingen, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany
06918260017271986817536.jpg
Gypsum

Clay pit Nelskamp, Breitscheid, Ratingen, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany
09115050017272075613311.jpg
Gypsum

Clay pit Nelskamp, Breitscheid, Ratingen, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany
02365270017370323934486.jpg
Gypsum

Clay pit Nelskamp, Breitscheid, Ratingen, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany
06918260017271986817536.jpg
Gypsum

Clay pit Nelskamp, Breitscheid, Ratingen, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany
09115050017272075613311.jpg
Gypsum

Clay pit Nelskamp, Breitscheid, Ratingen, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany
02365270017370323934486.jpg
Gypsum

Clay pit Nelskamp, Breitscheid, Ratingen, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany
Locality type:Pit
Classification
Species:Gypsum
Formula:CaSO4 · 2H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Gypsum data
Locality Data:Click here to view Clay pit Nelskamp (Breitscheid clay pit), Breitscheid, Ratingen, Mettmann, Düsseldorf, North Rhine-Westphalia, Germany
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:700443
Long-form Identifier:1:3:700443:8
GUID (UUID V4):0
References
Beyer, H. (1979) Über Einflußfaktoren auf Tracht, Habitus, Skelettformen, Verzerrungen, Zwillings- und Aggregatbildungen an Kristallen (mit Erläuterungen) Der Aufschluss, 30 (2) 33-50
 
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