By: nova-an-slc
Image: Callan Bentley, Mid-Atlantic Geo-Image Collection
License: Creative Commons Non Commercial ⧉

Uploaded: 8 Jan 2021
Last Updated: 25 Jan 2021

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This is a coarse-grained granite that contains quartz and feldspar. Muscovite mica is often present. Many gem materials (aquamarine, tourmaline, topaz) are found in pegmatites.