Gypsum : CaSO4·2H2O
Photo added to mindat.org
“Long edge on top xl is 4 mm. Thanks to Ralph Thomas.
Selenite on leached calcite. Presumably not "post post-mining".
”
Modris Baum - 21st January 2012
Photo added to mindat.org
“Long edge is 4 mm. This is a stereo child photo.
The stereo is a bit weird this time (even after alignment with the StereoPhoto Maker tool). I'm not sure why ...”
Modris Baum - 21st January 2012
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