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accessory mineral

American  

noun

Petrography.

  1. a mineral that is present in small amounts in a rock and has no bearing on the classification of the rock, as zircon in granite.

accessory mineral Scientific  

  1. A mineral that is present in a minor amount in rocks and is not considered an essential constituent of the rock.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It is frequently present as an accessory mineral in sulphide deposits containing ores of gold, copper, silver, lead, and zinc.

From The Economic Aspect of Geology by Leith, C. K. (Charles Kenneth)

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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