| Id | 46 |
| Identification Type | Mineral |
| Name | Gypsum |
| Distinguishing Features | Low-relief
Low-birefringence Tabular Acicular |
| Description | Transparent colorless. Nonpleochroic. Low birefringence (about the same as quartz). May occur as thin plates (folia), tabular euhedra, or acicular needles. Low relief. Detrital or authigenic. Frequently associated with pyrite when authigenic. May be twinned. Caution: common precipitate from pore waters of cores as they age in storage. Also, heating slide may cause polysynthetic twinning. |
| Tags | |
| External Resources | Gypsum on MinDat |
| Imposters | |
| Images |
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Unique Identification: Gypsum Site name: Miscanti Light type: Cross-Polarized Light Magnification: not specified Submitted by: Andy Breckenridge Notes: none Image Tags: none |
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Unique Identification: Gypsum Site name: Hurleg Lake Light type: Cross-Polarized Light Magnification: not specified Submitted by: not specified Notes: none Image Tags: none |
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Unique Identification: Gypsum Site name: Hurleg Lake Light type: Plane-Polarized Light Magnification: not specified Submitted by: not specified Notes: none Image Tags: none |
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Unique Identification: Gypsum Site name: Hurleg Lake Light type: Cross-Polarized Light Magnification: not specified Submitted by: not specified Notes: none Image Tags: none |
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Unique Identification: Gypsum Site name: Hurleg Lake Light type: Plane-Polarized Light Magnification: not specified Submitted by: not specified Notes: none Image Tags: none |
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Unique Identification: Gypsum Site name: Miscanti Light type: Plane-Polarized Light Magnification: not specified Submitted by: Andy Breckenridge Notes: none Image Tags: none |
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Unique Identification: Gypsum Site name: Great Salt Lake, UT Light type: Cross-Polarized Light Magnification: not specified Submitted by: Andy Breckenridge Notes: gypsum, authigenic Image Tags: none |
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Unique Identification: Gypsum Site name: Great Salt Lake, UT Light type: Plane-Polarized Light Magnification: not specified Submitted by: Andy Breckenridge Notes: gypsum, authigenic Image Tags: none |
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Unique Identification: Gypsum Site name: Peten Itza Light type: Plane-Polarized Light Magnification: 100 Submitted by: Michael Rosen Blas Valero Notes: transparent low-birefringent monoclinic euhedral Image Tags: none |
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Unique Identification: Gypsum Site name: Peten Itza Light type: Cross-Polarized Light Magnification: 100 Submitted by: Michael Rosen Blas Valero Notes: transparent low-birefringent monoclinic euhedral Image Tags: none |
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Unique Identification: Gypsum Site name: Atacama Light type: Plane-Polarized Light Magnification: 100 Submitted by: Michael Rosen Blas Valero Notes: transparent, carbonate inclusions, euhedral Image Tags: none |
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Unique Identification: Gypsum Site name: Atacama Light type: Cross-Polarized Light Magnification: 100 Submitted by: Michael Rosen Blas Valero Notes: transparent, carbonate inclusions, euhedral Image Tags: none |
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Unique Identification: Gypsum Site name: Peten Itza Light type: Plane-Polarized Light Magnification: 630 Submitted by: Michael Rosen Blas Valero Notes: carbonate inclusions, transparent low-birefringent monoclinic euhedral Image Tags: none |
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Unique Identification: Gypsum Site name: Peten Itza Light type: Cross-Polarized Light Magnification: 630 Submitted by: Michael Rosen Blas Valero Notes: carbonate inclusions, transparent low-birefringent monoclinic euhedral Image Tags: none |
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Unique Identification: Gypsum Site name: Hurleg Lake Light type: Plane-Polarized Light Magnification: not specified Submitted by: not specified Notes: none Image Tags: none |
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Unique Identification: Gypsum Site name: Hurleg Lake Light type: Cross-Polarized Light Magnification: not specified Submitted by: not specified Notes: none Image Tags: rutilated |
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Unique Identification: Gypsum Site name: Miscanti Light type: Plane-Polarized Light Magnification: 100 Submitted by: Blas Valero Notes: transparent low-birefringent monoclinic euhedral corroded Image Tags: none |
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Unique Identification: Gypsum Site name: Miscanti Light type: Cross-Polarized Light Magnification: 100 Submitted by: Blas Valero Notes: transparent low-birefringent monoclinic euhedral corroded Image Tags: none |
116 Church Street NE, Minneapolis, MN 55455
P: 612-626-7889