Locality: "Cat Hole Rd." locality, West Side of Green Mtn. Claremont, NH
Specimen Size: 8 cm specimen with staurolite crystals embedded in silvery mica schist.
Field Collected: Dick Holmes & Eric Green
Catalog No.: 1755a
Notes: These specimens were obtained from a box-full of "give-aways" from the Keene Mineral Club booth at the 2010 Gilsum Rock Swap.
Locality: "Cat Hole Rd." locality, West Side of Green Mtn. Claremont, NH
Specimen Size: 3.3 cm staurolite crystal with attached silvery mica schist.
Field Collected: Dick Holmes & Eric Green
Catalog No.: 1755b
Notes: The front facing surface of this crystal is a vertical cleavage revealing the zonned crystal interior. From the light-colored exterior appearance of these crystals, I thought they might be andalusite. An EDS analysis of the lighter colored mineral zone showed it to be staurolite with a minor zinc content. The EDS analysist said "Staurolite scavenges zinz during formation." The orange-brown interion of the crystal is more typical of an expected staurolite coloration. This glassy orange-brown material has yet to be analyzed.
One may wonder if the staurorite metamorphosis process that formed these crystals was only partially completed, or is the zoning due to an alteration process of previously fully formed crystals?
Locality: "Cat Hole Rd." locality, West Side of Green Mtn. Claremont, NH
Specimen Size: Zoom view of lower portion of 1755b specimen above
Field Collected: Dick Holmes & Eric Green
Catalog No.: 1755b
Notes: Zoom view shows glassy orange-brown zoning. Note embedded garnet.
Locality: "Cat Hole Rd." locality, West Side of Green Mtn. Claremont, NH
Specimen Size: Complete, 3.7 cm staurolite crystal. Iron staining on right side.
Field Collected: Dick Holmes & Eric Green
Catalog No.: 1755c
Notes:
Locality: "Cat Hole Rd." locality, West Side of Green Mtn. Claremont, NH
Specimen Size: 2 cm staurolite crystal cross-section.
Field Collected: Dick Holmes & Eric Green
Catalog No.: 1755d
Notes: The EDS analysis material for this locality was sampled from a glassy-gray area of this specimen.
Locality: Hemlock Center locality, Charlestown, NH
Specimen Size: 5.5 cm specimen
Field Collected: Tom Mortimer
Catalog No.: 838
Notes: This is a Phillip Morrill locality
Locality: Hemlock Center locality, Charlestown, NH
Specimen Size: 4.2 cm complete staurolite crystal with minor schist matrix at bottom.
Field Collected: Tom Mortimer
Catalog No.:
Notes: Staurolite crystals from this locality are quite crude and have little contrast with the schist matrix.
Locality: Power line area north of Dyke Rd., Sugar Hill, NH
Specimen Size: 4.2 cm complete staurolite crystal in dark matrix with small garnets.
Field Collected: Tom Mortimer
Catalog No.: 973
Notes: The staurolite crystals from this locality are quite hard and glassy, but difficult to fully expose in the matrix.
Locality: Power line area north of Dyke Rd., Sugar Hill, NH
Specimen Size: 10 cm specimen with complete 5 cm staurolite crystal in silvery matrix with small garnets.
Field Collected: Tom Mortimer
Catalog No.:
Notes:
Locality: Garnet Hill, Sugar Hill, NH
Specimen Size: 7.5 cm specimen with 4.5 cm staurolite crystal and small garnets.
Field Collected: Tom Mortimer
Catalog No.:
Notes: