David K. Joyce


12.5x8.0x1.4 cm
Central Mine
Keweenaw County
Michigan, USA


Item number: 21424

Here is an interesting one! It is largely a plate of copper encrusted with a light greenish silicate mineral(s). Interestingly, there are several fairly sharp copper crystals poking through the silicate, here and there, on both sides. Nice crystals!