SPHALERITE - ZnS, ZINC SULFIDE. Extremely nice Specimen of Sphalerite crystals isolated on spike of fine Drusy quartz. Brillant crystals of orange- amber color. From Cumberland Mine, Smith County, Tennessee. Size 1-1/2" wide x 1" deep x 1-5/8" high. Gemmy specimen. No damage.For background on this area see "Mineraogical Record" magizine July - August of 1978 - pages 213 -218.