Sphalerite (Zinc Sulfide)
From Ohio History Central
Revision as of 15:28, 23 May 2013 by Admin
Sphalerite, Mexico; N 9336
Generally found as small, brown to reddish-brown crystals in Silurian dolomites in southern Ohio in the Serpent Mound zinc district. Sphalerite is also found in concretions in the Devonian-age Ohio Shale.