Locality: Chickering Mine, Walpole, NH
Specimen Size: 3 mm field of view
Field Collected: Tom Mortimer - 2011
Catalog No.: u1370
Notes:
Locality: Plume Mine, N. Groton, NH
Specimen Size: 2 mm field of view
Field Collected: Bob Wilken
Catalog No.: A Bob Wilken specimen and photo
Notes:
Locality: Franconia, NH
Specimen Size: 3.5 mm crystal
Field Collected: Acquired by Gene Bearss through trade. Gifted to Tom Mortimer
Catalog No.: TBC
Notes: A nifty little crystal. It would be valuable if more was known about its history and locality. Gene stated he acquired this specimen from a 1976 swap. The label said "Cobaltite." Lacking NH cobaltite specimens in other collections, the cobaltite identification of this specimen was suspect. However, a historical reference (Hayes, American Journal of Science #24, pg. 386, 1833) to cobalt rich arsenopyrite ("Danaite") in Franconia, NH gives some credence to a cobaltite identification. Mindat includes a page dedicated to cobaltian arsenopyrite: ( mindat.org link) giving a chemistry ranging from (Fe0.90Co0.10)AsS to (Fe0.65Co0.35)AsS
Philip Morrill in his New Hampshire Mines and Mineral Localities lists "danaite" for both the Franconia Iron Mine (listed under the town of Lisbon, but it is actually in Sugar Hill) and under "General" minerals for the town of Franconia.
A January, 2014 EDS analysis showed this small crystal to be arsenopyrite, but with a small measurable amount of cobalt, very likely exceeding the ten percent substitution required for danaite. Therefore, it is reasonable to identify this specimen as "arsenopyrite var. danaite."
Locality: Parker Mtn. Mine, Center Strafford, NH
Specimen Size: 1 cm field of view
Field Collected:
Catalog No.: u1497
Notes: Arsenopyrite confirmed by EDS analysis.
A gift from Dana Morong.
Locality: Franconia, NH
Specimen Size: 5 cm specimen with 1.7 cm arsenopyrite crystal
Field Collected: Unknown - a purchased specimen
Catalog No.: 2013
Notes: Matrix is gray quartzite.
Locality: Pike-Hooksett Quarry, Hooksett, NH
Specimen Size: 4 cm specimen. Massive arsenopyrite on quartz
Field Collected: Don Swenson
Catalog No.: A Don Swenson specimen
Notes:
Locality: Palermo Mine, N. Groton, NH
Specimen Size: 1 mm arsenopyrite crystal
Field Collected: Bob Whitmore ?
Catalog No.: A Don Dallaire specimen
Notes: Classic diamond arsenopyrite shape. Matrix is mica.
This specimen was part of a 39 specimen boxed set Don acquired from Bob Whitmore.
Locality: Gingras Farm Locale, NH
Specimen Size: 3 cm specimen
Field Collected: Tom Mortimer - 5/21/00
Catalog No.: 1998
Notes: Arsenopyrite confirmed by EDS analysis. Inclusion of cobalt was forced in the analysis. Its presence in the noise is dubious.
This is a voucher specimen for arsenopyrite at the Gingras Farm locale. Arsenopyrite has not previously been reported from here.
Locality: Gingras Farm Locale, Deering, NH
Specimen Size: 6 cm specimen with 2.5 cm zone of massive, gray, arsenopyrite in iron stained pegmatite
Field Collected: Tom Mortimer - June 2000.
Catalog No.: NC
Notes: A greenish scorodite crust appears to be sporadically present on the fresh broken surface.
Locality: Dodge Gold Mine, Lyman, NH
Specimen Size: 2.5 mm crystal group, two views
Field Collected: Cliff Trebilcock
Catalog No.: u2280
Notes: