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 <br /><br /></p>