March/April 2012: In This Issue
by Frank Bain
A new and unique find of carnelian-replaced freshwater clams was recently made east of the Petrified Forest National Park in Arizona.
by Jared T. Freiburg and John Rakovan
A discovery of exceptional calcite crystals, concentrically zoned with marcasite and pyrite inclusions, was recently made in the Chicago metropolitan area at the Conco mine, North Aurora.
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