Locality: Palermo Mine, N. Groton, NH
Specimen Size: 0.4 mm crystal group height
Field Collected: Walter Lane
Catalog No.: u1269
Notes: Palermo Mine stewartite images are quite rare on the web. Tiny black rockbridgeite balls are in the background.
Locality: Valencia Mine, N. Groton, NH
Specimen Size: 0.8 mm feathery Stewartite crystal.
Field Collected: Tom Mortimer
Catalog No.: u1269
Notes: Visual ID by Bob Whitmore.
Locality: Palermo #1 Mine, Pod 3, N. Groton, NH
Specimen Size: 0.7 mm stewartite crystal
Field Collected: Forrest Fogg - 1973
Catalog No.: u1446 e.g.
Notes:
Locality: Palermo #1 Mine, Pod 3, N. Groton, NH
Specimen Size: 1.5 mm stewartite crystal cluster
Field Collected: Forrest Fogg - 1973
Catalog No.: u1446 e.g.
Notes: The fine filaments are strunzite. Photo is from stack of 15 images processed with Helicon Focus.
Locality: Palermo #1 Mine, Pod 3, N. Groton, NH
Specimen Size: 5 mm field of view. Stewartite crystal fans with laueite.
Field Collected: Forrest Fogg - 1973
Catalog No.: u1446 e.g.
Notes: Photo is from stack of 21 images processed with Helicon Focus.
Locality: Palermo #1 Mine, Pod 3, N. Groton, NH
Specimen Size: Largest crystal 0.6 mm
Field Collected: Forrest Fogg
Catalog No.: u1447
Notes: From Pod 3 rough given by Gordon Jackson
Locality: Parker Mtn. Mine, Center Strafford, NH
Specimen Size: 1 mm cluster of lemon-yellow stewartite crystals
Field Collected: Gene Bearss - 1980
Catalog No.: A Gene Bearss specimen
Notes:
Locality: Fletcher Mine, Groton, NH
Specimen Size: 0.9 mm field of view
Field Collected: ex Fred Devito collection
Catalog No.: A Doug Rambo specimen (# 1282 on box bottom)
Notes:
Locality: Fletcher Mine, N. Groton, NH
Specimen Size: 0.8 mm fov
Field Collected: Clayton Ford. ex. Gordon Jackson
Catalog No.: e.g. u1954
Notes: Not a particularly good photo. Voucher specimen for stewartite at the Fletcher Mine.
Locality: Fletcher Mine, N. Groton, NH
Specimen Size: 0.5 mm fov
Field Collected: Clayton Ford. ex. Gordon Jackson
Catalog No.: e.g. u1954
Notes: Not a particularly good photo. Voucher specimen for stewartite at the Fletcher Mine.
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."