Cummingtonite gem
WebAug 21, 2024 · Description. Acicular yellow to green crystals of cummingtonite, (variety magnesio-cummingtonite) richly covering different cavities of a matrix of crystallized … WebIntroducing a new gem, Cummingtonite (ps I can't draw) comments sorted by Best Top New Controversial Q&A Add a Comment testyourmine THE HIATUS NEVER ENDS • …
Cummingtonite gem
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Webcummingtonite noun cum· ming· ton· ite ˈkəmiŋtəˌnīt plural -s : a mineral (Fe, Mg)7Si8O22(OH)2 consisting of an ironmagnesium amphibole isomorphous with … 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 …
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 WebCummingtonite (1 - 21 of 21 results) Price ($) Shipping All Sellers Large Gem Rhodonite with Cummingtonite ~ Brazil ~ deep red ~ unpolished specimen ~ gem quality ~ …
WebGeneral Cummingtonite Information Chemical Formula: [ ]Mg7Si8O22 (OH)2 Composition: Molecular Weight = 780.82 gm Magnesium 21.79 % Mg 36.13 % MgO Silicon 28.78 % Si …
WebDescription: Cummingtonite is a member of the amphibole family. It commonly forms elongated to fibrous green to brown grains in metamorphosed iron-rich rocks. ASHLAND COUNTY: Cummingtonite … cahr 2022 abstractsWebDepartment of Geosciences · Princeton University · Guyot Hall · Princeton NJ 08544 Contact information: Phone - 609-258-4101 · Fax - 609-258-5275 · E-mail cna answersWebTIL there is a mineral named Cummingtonite. Its chemical composition is (Mg,Fe2+)2 (Mg,Fe2+)5Si8O22 (OH)2. It was named after Cummington, Massachusetts, where it was discovered in 1824. : r/todayilearned TIL … cahps survey primary carehttp://wheretofindrocks.com/cummingtonite-we-know-you-were-looking-for-iron-rich-amphiboles/#:~:text=Cummingtonite%20is%20a%20rather%20uncommon%20mineral%2C%20hailing%20from,in%20honor%20of%20the%20town%20it%20was%20found. cahp systemWebCummingtonite is defined as a monoclinic amphibole belong to the magnesium-iron-manganese amphibole subgroup. It is defined with Mg as the dominant element both in the B and C positions. Colour: Translucent dark green, brown, grey, colourless Lustre: Vitreous Hardness: 5 - 6 Specific Gravity: 3.1 - 3.6 Crystal System: Monoclinic Member of: cahr 2023 abstractWeb@ Wikredia Nice wiki Cummingtonite Cummingtonite is a metamorphic amp bole with the chemical composition (Mg,Fe 2*) 2. IMA Crystal class: Prismatic H-M symbol: (2 Crystal … cah quality reportingWebCummingtonite, the Geology Meme Rock GeologyHub 216K subscribers Join Subscribe Share Save 3.2K views 2 years ago What is cummingtonite? And yes, this is a real mineral, not a joke. It is an... cna annual training programs