Graphic granite is a familiar and abundant constituent of many pegmatites, and unlike most other rocks of igneous origin it possesses certain definite characteristics that permit its ready identification in the field or in hand specimen. All graphic granite, when split in certain directions, shows an interesting structure that suggests crude attempts at writing or printing with a broad pointed pen. Commonly used terms, such as graphic granite, runite, graphic pegmatite, Hebraic pegmatite, and Schriftgranit, are all descriptive expressions designed to emphasize the importance of this most obvious property of the rock.

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