Gypsum gallery

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GYPSUM Beebe River ledge, Campton, NH 9 cm specimen with crust of pale-yellow gypsum crystals.	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:
GYPSUM Beebe River ledge, east bank below falls, Campton, NH 0.1 to 0.2 mm gypsum crystals GYPSUM Beebe River ledge, east bank below falls, Campton, NH 0.1 to 0.2 mm gypsum crystals	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:
GYPSUM var. Selenite? Plume Mine, N. Groton, NH 4 mm FOV GYPSUM var. Selenite? Plume Mine, N. Groton, NH 2 mm fov	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.
GYPSUM Palermo #1 Mine, N. Groton, NH 5 mm field of view	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 .
GYPSUM Johnson Rd., Bow, NH 5 mm field of view	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.
GYPSUM Johnson Rd., Bow, NH 0.7 mm crystal group	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..
GYPSUM Johnson Rd., Bow, NH 1 mm field of view GYPSUM Johnson Rd., Bow, NH 0.7 mm field of view GYPSUM Johnson Rd., Bow, NH 0.7 mm field of view	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.
GYPSUM Chickering Mine, Walpole, NH 0.3 mm gypsum crystal	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.
GYPSUM Chickering Mine, Walpole, NH 0.1 mm gypsum crystal	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.
GYPSUM Parker Mtn. Mine, Strafford, NH 1.14 mm field of view	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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