Mineral: Heidornite
Locality: Frenswegen 3 deep bore, 1968 meters depth, Frenswegen, Nordhorn, Bentheim District, Lower Saxony/Niedersachsen, Germany
Dimensions: 18 x 18 mm

Description: Colorless, partial crystal of heidornite embedded in massive anhydrite. The material was discovered in 1955 during prospection works for natural gas in a drill core section coming from 1968 m depth.

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