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Gypsum Mineral Data
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General Gypsum Information
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 Chemical Formula: |
CaSO4•2(H2O) |
| Composition: |
Molecular Weight = 172.17 gm |
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Calcium 23.28 % Ca 32.57 % CaO |
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Hydrogen 2.34 % H 20.93 % H2O |
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Sulfur 18.62 % S 46.50 % SO3 |
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Oxygen 55.76 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ca(SO4)•2(H2O) |
| Environment: |
Sedimentary evaporite deposits. |
| IMA Status: |
Valid Species (Pre-IMA) Prehistoric |
| Locality: |
Numerous localities worldwide. Naica, Chihuahua, Mexico. Link to MinDat.org Location Data. |
| Name Origin: |
From the Greek, gyps meaning "burned" mineral. Selenite from the Greek in allusion to its pearly luster (moon light) on cleavage fragments. |
| Name Pronunciation: |
Gypsum  |
| Synonym: |
Alabaster |
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ICSD 2057 |
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PDF 33-311 |
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Satin Spar |
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Selenite |
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