Sphalerite, Marcasite - Standard Slag Quarry, USA - 3 cm x 2.6 cm x 2.5 cm

Mineral: Sphalerite, Marcasite
Locality: Standard Slag Quarry, Adams County, Ohio, USA
Dimensions: 3 cm x 2.6 cm x 2.5 cm

Description: Iridescent sphalerite twin with small marcasite blades on a dolomite matrix.