Callaghanite, Houghton Co, MI - Item MSCLL003

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$45.00
$45.00
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Very interesting Callaghanite specimen from Houghton Co, MI. This piece appears to be Callaghanite that grew on a piece of copper that formed between two fire bricks, and will include a stand. Recently we had acquired some pieces that we believe to be from the Champion #4 Mine in Painesdale, MI. The specimens displayed an odd blue coating on firebrick. It was not until recently through a combination of SEM-EDS analysis, EMP-WDS analysis, and Raman Spectroscopy that these blue coatings were conclusively identified as Callaghanite; a rare copper-magnesium mineral that is a new species in Michigan.
Approximate size: 56x42x3
Weight: 7.5
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