Barytes

(BaSO4)

Characteristics

  • High density ( 4.4 g/cm³)
  • White powder
  • Crystal: rhombical
  • Mohs‘ hardness: 3-3.5
  • Fracture: shell-shaped, brittle
  • High radiation absorption
  • Chemically inert
  • Resistant to acid and alkali

Fluorite

(CaF2)

Characteristics

  • Density: 3.2 g/cm³
  • Streak color: white
  • Crystal: cubical
  • Mohs‘ hardness: 4
  • Fracture: plane to shell-shaped, brittle