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GYPSUM #1 (detail)
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Alabaster Gypsum
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Basic Key
QFL Clastic Key
Composition
CaSO
4
.
H
2
O; Hardness 1.5-2; Cleavage perfect one direction, distinct in other two (when visible); white, colorless, gray, yellow, red, brown; Luster pearly on cleavages.
Description
Laminated alabaster gypsum. Gypsum takes on many forms, such as
alabaster
,
selenite
,
satin spar
, and
rose gypsum
.
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Last Update: 7/18/00
e-mail:
(Fichtels@jmu.edu)