Locality: Parker Mtn. Mine, Strafford, NH
Specimen Size: 1.52 mm field of view
Field Collected: Bob Wilken
Catalog No.: Bob Wilken # PM-Gypsum02
Notes:
Locality: Palermo Mine, Groton, NH
Specimen Size: 2.8 mm field of view
Field Collected:Dana Jewell ?
Catalog No.: u2665
Notes: Matrix is rockbridgeite. My original thought was that this is palermoite, from the luster and striated prism face. A Raman analyses (black trace in plot) by George Adleman indicated gypsum, which after a follow-up visual review, agrees. This is the first clear Palermo gypsum that I have seen.
Jim Nizamoff opined on another similar matrix specimen (not a gypsum one) that it was more likely a Fletcher piece.
Locality: Palermo Mine, Groton, NH
Specimen Size: 0.46 mm crystal group
Field Collected: Bob Wilken
Catalog No.: A Bob Wilken specimen and photo
Notes: [bw] The matrix is pretty much solid pyrite. And, the crystallization is pretty coarse and crusty-looking.
Locality: Beebe River Gorge, Campton, NH
Specimen Size: 1.4 mm field of view
Field Collected: Unknown - Purchased at the Baltimore Mineral Symposium, 2022
Catalog No.: u2631
Notes: A 1 cm specimen covered with tiny gypsum crystals in a 3/4" black. old-style, micro box. I had to find an edge where crystals protruded for contrast with the black box background.
Locality: Chickering Mine, Walpole, NH
Specimen Size: 2.0 mm field of view - top photo
Field Collected: Tom Mortimer - 2007
Catalog No.: TBC
Notes: The 1.5 cm host specimen is very oxidized. A visual identification.