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1 specimens listed
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Native Silver and Copper
stock #15.1-651
Keweenaw Co.
Michigan, United States
7.7 x 6.1 x 1.2 CM (cabinet)
price: $290
Early summer 2023

A USA classic Silver-Copper ex Johannson collection. The Silver is in crude crystals and masses most of which protrude from the Copper. The thin sheet of metal is is from .8 to 1.2 CM thick, but weighs a hefty 124 grams, which indicates a high percentage of Silver. There is no mine attribution in the collection notes but this was obtained in the late 1940 era by trade.