Prehnite with copper included calcite
description: <p style="text-align: justify;">LOCALITY: Tamarack Mine, Houghton County, Michigan, United States
<br /><br />3" Across
<br /><br />This unusual specimen was bought from Dan Weinrich in January 2018. It was formerly in the collection of Charles Noll.
<br /><br />Formerly in the collection of Melbourne, Victoria, Australia
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