Augite gallery

AUGITE Gallery Return to Augite page. Click on image for larger view

AUGITE West side of Piper Mtn., Gilford, NH 4.5 cm specimen with embedded crystaline black augite	Species: AUGITE Locality: West side of Piper Mtn., Gilford, NH Specimen Size: 4.5 cm specimen with embedded crystaline black augite in plagioclase matrix Field Collected: Tom Mortimer - Sept, 2011 Catalog No.: 1806 Notes: This is a typical rock sample of the Gilmantion (Augite) Monzodiorite present on the southwest side of the Belknap Mtn. range. Reference: Stepping Stones Across New Hampshire by Long & Roberts, 2005, pg 35.
AUGITE Lockes Hill, Gilford, NH 1.2 cm augite crystal weathered from diorite matrix	Species: AUGITE Locality: Lockes Hill, Gilford, NH Specimen Size: 1.2 cm augite crystal weathered from diorite matrix Field Collected: Tom Mortimer Catalog No.: 1481 Notes:
AUGITE Rt. 101 - 101A Road Cut, Amherst, NH 3.5 cm specimen with 8 mm embedded augite AUGITE Rt. 101 - 101A Road Cut, Amherst, NH 3.5 cm specimen with 8 mm embedded augite	Species: AUGITE Locality: Rt. 101 - 101A Road Cut, Amherst, NH Specimen Size: 3.5 cm specimen with 8 mm embedded augite Field Collected: Tom Mortimer Catalog No.: u324 Notes: Augite chemistry: (Ca,Mg,Fe)₂Si₂O₆ A Bill Simmons' article on pyroxene in Brittanica.com states: "The nature of aluminum substitution in pyroxenes varies significantly from one pyroxene to another.... ...In augite there can be extensive substitution of aluminum for tetrahedral silicon." A polished grain EDS analysis (BC241) of this specimen gave: (Ca_0.45,K_0.04,Mg_0.37,Fe_0.41)(Si_1.5,Al_0.5)O_2.2 normalized for Si + Al = 2.