GYPSUM
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Luster: Nonmetallic |
Lab Book Description: |
Hardness: 2 |
Colorless, white, or gray; Forms tabular crystals, prisms, blades, or needles (satin spar variety); Transparent to translucent; Very soft; Cleavage good; SG = 2.3 |
Streak: White |
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Appears on these flash cards: hardness of < 2.5 (less than 2.5); used for drywall and as a sculpture medium
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