Sample #20
Colour: White, colourless or grey
Hardness: 2 (can be scratched by a finger nail)
Streak: White
Luster: Vitreous to pearly
Magnetic: No
Conductive: No
Cleavage: Good but not visible
Relative Density: 2.3
Distinguishing Characteristics: Soft but not as soft as talc
Uses: Gypsum is used to make chalk, drywall, plaster, cement, caulking and paints.
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