WebMay 4, 2011 · The NGB is mostly composed of mafic metavolcanic rocks. The dominant lithology is a heterogeneous amphibolite composed of cummingtonite + plagioclase + biotite ± quartz ± garnet ± anthophyllite (Figs. 16.1 and 16.2A).This lithological unit exhibits important variations in mineralogical proportions ranging from garnet-biotite schist to … WebCummingtonite was originally named in 1824 by Chester Dewey for the locality in Cummington, Massachusetts, USA. Investigations between 1930 and 1961 showed that the original cummingtonite is Fe dominant and therefore is a grunerite.

Cummingtonite Mineral Specimen For Sale - Dakota …

WebCummingtonite (dark-brown) from the Sterling Hill Mine, Ogdensburg, NJ. Field of view 1/2". From the collection of, and photo by, DW. WebAnthophyllite is an orthorhombic amphibole mineral: ☐Mg 2 Mg 5 Si 8 O 22 (OH) 2 (☐ is for a vacancy, a point defect in the crystal structure), magnesium iron inosilicate hydroxide.Anthophyllite is polymorphic with cummingtonite.Some forms of anthophyllite are lamellar or fibrous and are classed as asbestos.The name is derived from the Latin … lititz home educators

Cummingtonite mineral Britannica

WebGeneral Cummingtonite Information : Chemical Formula: [ ]Mg7Si8O22(OH)2 : Composition: Molecular Weight = 780.82 gm ... McDougall Minerals Google Search for … WebFeaturing Jackson's Crossroads amethyst crystals, mineral specimens and stones for Reiki & metaphysical work "The Mineral Gallery" Georgia's best Rock Shop! 155 Mill Road, McDonough, GA 30253 (20 minutes South of Atlanta, Ga - I-75 exit 221) You're on "Rock Shop 4" page. ... even buy crystal/mineral postage & postcards on Zazzle! ... WebNov 4, 2013 · Cummingtonite This mineral is a metamorphic amphibole and a a magnesium ironsilicate hydroxide with a strange name. Like most substances, it was named after where it was discovered: the innocent town of Cummington, Massachusetts, in the United States. 5. Dickite lititz house b\u0026b for sale