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Dark blue, zoned fluorite crystals on quartz from 450 m level, Beihilfe mine, Halsbrücke, Saxony. Sample width: 8 cm. (Author: Andreas Gerstenberg)

Dark blue, zoned fluorite crystals on quartz from 450 m level, Beihilfe mine, Halsbrücke, Saxony. Sample width: 8 cm. (Author: Andreas Gerstenberg)

Dimensions: 649 x 540
File size: 39.44 kbytes
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