Sphalerite

=** Sphalerite **

**3. its color is usally gray black yellow or brown** **4 it has a hardness on 3.5 - 4 on the mohs hardness scale** **5.Sphalerite is a chief ore of zinc.**
 * ** 1.Sphalerite is non magnetic. ** **
 * 2.Sphalerite is non radioactive **