Locality: Palermo Mine, Pod #3, N. Groton, NH
Specimen Size: 0.5 mm cluster of stewartite crystals
Field Collected: Forrest Fogg
Catalog No.: u2361
Notes: A visual ID based on the steep termination and lemon yellow color.
Stewartite, Mn2+Fe3+2(PO4)2OH2 · 8H2O , and
Laueite, Mn2+Fe3+2(PO4)2(OH) · 8H2O are dimorphs (identical chemistry) and similar in morphology. Stewartite twins show small "fish-tail" re-entry angles. Fishtail twins (rear center) are present in this photo. Both stewartite and laueite are triclinic, biaxial(-).
Locality: Palermo Mine, N. Groton, NH
Specimen Size: 0.8 mm field of view
Field Collected: Bob Whitmore - from a tub of Palermo phosphate rocks gifted by Bob.
Catalog No.: u2442
Notes: Habit and termination of these tiny yellow crystals suggests stewartite.
Photo from a stack of 53 images, Nikon Plan 10 objective lens, Ping-pong ball diffuser, one second exposure for each shot! First try with direct LED lighting was sparkle city !
Jim Nizamoff opined that stewartite is the best guess for these tiny crystals, "I have seen similar occurrences in material I have collected or acquired through Bob. There is a chance that these could be something more interesting but as usual the chemistry will possibly determine that."
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Locality: Palermo Mine, Groton, NH
Specimen Size: 2 mm field of view and 0.9 mm close-ups
Field Collected: Unknown - label says "Found at Palermo 8-73"
Catalog No.: u2792
Notes: Acquired from Micromounters of New England 2026 symposium sales table.
Locality: Palermo Mine, Groton, NH
Specimen Size: 3.5 mm field of view
Field Collected: Unknown - purchased specimen
Catalog No.: u2805
Notes: