- Color: green, yellow, orange, brownish orange, colorless
- Hardness: 3.5 - 4
- Refractive index: 2.37 - 2.40
- Density: 3.90 - 4.05
- Chemical composition: ZnS
- Crystal structure: isometric
- Origins: Mexico, USA, Spain, Bulgaria.
Sphalerite is too soft to be used in jewelry but clean crystals are very rare and interesting for collectors. Stones are generally not treated.