WebOct 30, 2013 · Cummingtonite Surprisingly, despite its apparently innuendo heavy name, this rock has a very staid background. The mineral is a metamorphic amphibole, and is a magnesium ironsilicate hydroxide.Similarly to Fukalite, it was named after where it was discovered – in this case the town of Cummington, Massachusetts, in the US. Cummingtonite is a member of the cummingtonite-grunerite solid solution series which ranges from Mg 7Si 8O 22(OH) 2 for magnesiocummingtonite to the iron rich grunerite endmember Fe 7Si 8O 22(OH) 2. Cummingtonite is used to describe minerals of this formula with between 30 and 70 per cent Fe 7Si … See more Cummingtonite is a metamorphic amphibole with the chemical composition (Mg,Fe ) 2(Mg,Fe ) 5Si 8O 22(OH) 2, magnesium iron silicate hydroxide. Monoclinic cummingtonite is compositionally … See more Cummingtonite is commonly found in metamorphosed magnesium-rich rocks and occurs in amphibolites. Usually it coexists with See more Cummingtonite was named after the town of Cummington, Massachusetts, where it was discovered in 1824. It is also found in Sweden, South Africa, Scotland, and New Zealand. See more • Deer, W.A.; Howie, R.A. & Zussman, J. (1997). An Introduction to the Rock Forming Minerals (2nd ed.). pp. 229–247. • Hurlbut, Cornelius S. & Klein, Cornelis (1985). Manual of Mineralogy (20th ed.). Wiley. ISBN 0-471-80580-7. See more
Cummingtonite, the Geology Meme Rock - YouTube
WebMar 17, 2024 · Collectors can learn much about a mineral’s chemical composition and geological origins from a gem’s size, color and clarity. Each of the stones in the … WebSep 1, 2005 · Rhodonite, with the formula CaMn 3 Mn [Si 5 O 15] (mindat.org), is a member of the triclinic crystal system and occurs in manganese-bearing rocks. Figure 2. These … sharepoint security updates
Cummingtonite (of Dewey): Mineral information, data and …
WebMineral and Gem Collection. Off screen link: Skip to content Off screen link: Skip to search. Mineral and Gem Collection. Main Menu. Menu. Search by Specimen; ... Webcummingtonite, an amphibole mineral, an iron and magnesium silicate that occurs in metamorphic rocks. For chemical formula and detailed physical properties, see amphibole (table). This article was most recently revised … WebJul 9, 2024 · (Insert Emoji That Most Accurately Fits Your Gem):lemon: [Classification] Gemstone:-Cummingtonite. Gem Type:-Cummingtonite-Grunerite solid solution. … sharepoint security trimming