igneous
Graphic Granite
Alkali feldspar and quartz pegmatite
AI-generated identification · may be incorrectHardness of 6-7 on the Mohs scale, with a vitreous to greasy luster and a distinctive cuneiform or runic pattern of dark quartz within pale feldspar.
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Physical properties
Hardness of 6-7 on the Mohs scale, with a vitreous to greasy luster and a distinctive cuneiform or runic pattern of dark quartz within pale feldspar.
Formation & geological history
Formed through the simultaneous crystallization of quartz and feldspar in cooling pegmatite magmas.
Uses & applications
Used primarily as an ornamental stone, in lapidary arts, and as a sought-after specimen for mineral collections.
Geological facts
The graphic intergrowth resembles ancient cuneiform or runic writing, giving the rock its name.
Field identification & locations
Easily identified in the field by its striking, hieroglyphic-like intergrowths of dark and light minerals; commonly found in pegmatite dikes worldwide.
