Although common in other New England states, actinolite is a relatively rare species in New Hampshire. Several specimens that the author thought were actinolite were analyzed to be ferrohornblende.
Locality: Ellacoya Locale, Gilford, NH
Specimen Size: 1.2 mm field of view
Field Collected: Tom Mortimer
Catalog No.: u2256
Notes: A polished grain EDS analysis (BC357) indicated actinolite. The APFU calculated from this analysis is Ca2(Mg2.1,Fe1.77,Al0.22)Si7.7O16.2 normalized for 2 Ca. The trace of neon is a bogie.
From analysis Mg/(Mg+Fe) = 0.55. This ratio must be less than 0.5 for ferroactinolite. So this is close to ferroactinolite.
Locality: Ellacoya Locale, Gilford, NH
Specimen Size: 3.5 mm field of view. Actinolite blades on feldspar.
Field Collected: Tom Mortimer
Catalog No.: NC
Notes:
Locality: Ellacoya Locale, Gilford, NH
Specimen Size: 1.8 mm field of view. Stubby actinolite crystals in diorite vug.
Field Collected: Tom Mortimer
Catalog No.:
Notes:
Locality: Ellacoya Locale, Gilford, NH
Specimen Size: 14 mm field of view.
Field Collected: Tom Mortimer
Catalog No.: u2372
Notes: Byssolite is a fibrous to hair-like crystal or mass of fibers frequently in the actinolite-tremolite series, but may be any amphibole species.
Locality: Ellacoya Locale, Gilford, NH
Specimen Size: 1.3 mm field of view. White end of crystals suggests zoning to tremolite.
Field Collected: Tom Mortimer
Catalog No.: TBC
Notes: