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Calcite on Copper; Calcite twin over Calcite phantom on Copper
Calcite on copper, 4.4 cm, from the Quincy mine, Hancock, Houghton County, Michigan. Ex William Prychodko and Robert Rann collections (2000); Jeff Scovil photo. Complex calcite twin over calcite phantom on copper, 6.4 cm, from the Copper Falls mine, Owl Creek fissure, Keweenaw County, Michigan. Ex Clarence S. Bement collection (1900). From Stuart Wilensky (1999). Pictured in American Mineral Treasures (2008). Jeff Scovil photo.
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