David K. Joyce

Sphalerite, Galena

6.8x5.4x4.0 cm
Flamboro Quarry
Wentworth County
Ontario, Canada

Sphalerite, GalenaSphalerite, Galena

Item number: 21603

A large, beautifully twinned black (really very dark brown) sphalerite on the right of this specimen with a couple of less coherent crystals to the left of it. You can see the varying stria that delineate the twinning, clearly. Interestingly, there are quite a few tiny galena octahedra scattered over the sphalerite crystal.