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[[File:GraniteCrystals.png|right|300px|thumb|A [[Magnify|magnified]] image of granite showing the '''crystals'''.]]
A '''rock crystal''' is a [[Rock Grain|rock grain]] with sharp edges.
: Singular [[Noun]]: '''Crystal'''
: Plural [[Noun]]: '''Crystals'''
: [[Verb]]: '''To crystalise'''
: [[Adjective]]: '''Crystalline'''
===About Rock Crystals===