GYPSUM Gallery Return to Gypsum page. Click on image for larger view | |
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Species: GYPSUM Locality: Beebe River ledge, Campton, NH Specimen Size: 9 cm specimen with crust of pale-yellow gypsum crystals. Field Collected: Tom Mortimer Catalog No.: Notes: |
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Species: GYPSUM Locality: Beebe River ledge, east bank below falls, Campton, NH Specimen Size: 0.1 to 0.2 mm gypsum crystals Field Collected: Tom Mortimer - 9/30/09 Catalog No.: e.g. u789 Notes: |
| Species: GYPSUM var. Selenite? Locality: Plume Mine, N. Groton, NH Specimen Size: First photo: 4 mm fov, second photo 2 mm fov Field Collected: Tom Mortimer Catalog No.: u1070 Notes: I had cataloged this specimen in 2010 as a marcasite. When I re-examined this specimen in May, 2012, I discovered that it had a substantial overgrowth of curly, white crystals, reminiscent of ram's horn selenite. This overgrowth had obviously happened AFTER I had boxed the specimen! Looking on mindat, the iron sulfate, rozenite, is also a candidate for this "mineral." Technically this specimen would not pass the formal definition of a mineral, due to failing the "naturally occurring" test. Tiny, monoclinic, water-clear, gypsum crystals are moderately common in the weathering sulfides found in the Plume Mine dumps. |
Species: GYPSUM CaSO4 · 2H2O Locality: Palermo #1 Mine, N. Groton, NH Specimen Size: 5 mm field of view Field Collected: Bob Whitmore Catalog No.: A Bob Whitmore specimen Notes: "Rams Horn" gypsum, likely partially altered (dried out) to anhydrite, CaSO4 . |
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Species: GYPSUM Locality: Johnson Rd., Bow, NH Specimen Size: 5 mm field of view Field Collected: 2016 Catalog No.: u2164 Notes: A visual identification. Mineral is fluorescent pale white in SW UV. EDS verification planned. A 16 image stack via Meiji trinocular port. |
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Species: GYPSUM Locality: Johnson Rd., Bow, NH Specimen Size: 0.7 mm crystal group Field Collected: 2016 Catalog No.: A Bob Wilken specimen and photo Notes: A visual identification.. |
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Species: GYPSUM Locality: Johnson Rd., Bow, NH Specimen Size: 1 mm field of view. Second, zoomed view, 0.7 mm FOV. Third photo shows overall 2.7 cm specimen. Field Collected: 2016 Catalog No.: u2131 Notes: A visual identification. Mineral is fluorescent pale white to slightly yellow-greenish in SW UV. Gypsum is frequently fluorescent. Initial thought was that this is hydrozincite, but fluorescence is too weak for that species. Bob Wilken suggested aragonite, but a small removed grain gave no muriatic acid fizz. EDS verification planned. A 47 image stack with Nikon Plan 10 objective. Third photo shows overall specimen with gypsum coating quartz crystals to the right of a galena mass. |
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Species: GYPSUM Locality: Chickering Mine, Walpole, NH Specimen Size: 0.3 mm gypsum crystal Field Collected: Tom Mortimer Catalog No.: u1395 Notes: This is the classic gypsum crystal shape. |
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Species: GYPSUM Locality: Chickering Mine, Walpole, NH Specimen Size: 0.1 mm gypsum crystal Field Collected: Tom Mortimer Catalog No.: u1395 Notes: These gypsum crystals are very lustrous. |
Species: GYPSUM Locality: Parker Mtn. Mine, Strafford, NH Specimen Size: 1.14 mm field of view Field Collected: Bob Wilken Catalog No.: Bob Wilken # PM-Gypsum01 Notes: |
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