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 Unabridged Dictionary, © Random House, Inc. 2023
How to use light mineral in a sentence
The light mineral is finely granulated and the whole is marked by uneven extinction.The Long Labrador Trail | Dillon Wallace