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GYPSUM #3 Go on to: #1 | #2 | #3 | #4 Alabaster gypsum 
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Physical Properties
CaSO4 . H2O; Hardness 1.5-2; Cleavage perfect one direction, distinct in other two (when visible); white, colorless, gray, yellow, red, brown; Luster pearly on cleavages. .
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Description
Satin spar gypsum. Fiberous variety. Do not confuse with kaolinite or chalk. |
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