igneous
Graphic Granite
Graphic granite (alkali feldspar and quartz pegmatite)
AI-generated identification · may be incorrectHardness of 6-7 on the Mohs scale, featuring distinct cuneiform or runic black tourmaline or dark mineral intergrowths in a pale quartz-feldspar matrix with a vitreous to pearly luster.
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Physical properties
Hardness of 6-7 on the Mohs scale, featuring distinct cuneiform or runic black tourmaline or dark mineral intergrowths in a pale quartz-feldspar matrix with a vitreous to pearly luster.
Formation & geological history
Formed through the simultaneous crystallization of quartz and feldspar in pegmatite magmas under slow-cooling conditions deep within the Earth's crust.
Uses & applications
Primarily collected as a decorative ornamental stone and geological specimen, occasionally used for lapidary arts.
Geological facts
The unique angular intergrowths resemble ancient cuneiform or runic writing, which gives the rock its descriptive name.
Field identification & locations
Easily identified in the field by its striking graphic patterns of dark mineral needles embedded in lighter feldspar. Commonly found in pegmatite dikes worldwide.
