Assertion: mineral's crystal | /r/RelatedTo | -grained rocks
Facets:
Source sentences:
text: Small quartz crystals may be found in cavities in limestone in the rocks of north Alabama, and large quartz crystals have been found associated with the coarse-grained rocks known as pegmatites, found in east Alabama.
text: Small quartz crystals may be found in cavities in limestone in the rocks of north Alabama, and large quartz crystals have been found associated with the coarse-grained rocks known as pegmatites, found in east Alabama.