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cummingtonite

 - 2 dictionary results

cum⋅ming⋅ton⋅ite

  [kuhm-ing-tuh-nahyt]
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–noun
an amphibole mineral, magnesium-iron silicate, similar in composition to anthophyllite but richer in iron.
Origin:
named after Cummington, Mass., where it is found; see -ite 1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Encyclopedia

cummingtonite

an amphibole mineral, an iron and magnesium silicate that occurs in metamorphic rocks. For chemical formula and detailed physical properties, see amphibole (table)

Learn more about cummingtonite with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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