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light mineral

noun, Geology
1.
any rock-forming mineral that has a specific gravity of less than 2.8 and is generally light in color.
Compare dark mineral.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for light mineral
  • The pesticide is mixed with a light mineral oil and applied as an ultra-low volume spray.
  • The sidewalls are covered with light mineral staining, which does not affect the integrity of the coating system.

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