Calcite
description: <p style="text-align: justify;">LOCALITY: Quincey Mine, Michigan, United States <br /><br />c 3" tall <br /><br />Michigan produced some of America's most highly sought after calcite specimens and this is a superb example.  It is an antique mineral specimen.  Considering that calcite is a soft (Moh's scale, 3) mineral species with perfect cleaveage along three planes, it is remarkable that such a historical specimen is in such good condition.  It would be even more valuable if it contained a lot of native copper inclusions. </p> <p style="text-align: justify;"> </p> <p style="text-align: justify;">This piece is part of the collection of The Smithsonian Institution, Washington DC.</p>

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