igneous
Graphic Granite
Graphic Granite (variety of Pegmatite)
Hardness: 6-6.5 (Mohs scale), Color: Cream, white, or salmon pink matrix with smoky-gray or black quartz; Luster: Vitreous to pearly; Crystal structure: Trigonal (Quartz) & Monoclinic (Feldspar); Cleavage: Perfect in two directions for feldspar; Specific Gravity: 2.5-2.8
- Hardness
- 6-6
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 6-6.5 (Mohs scale), Color: Cream, white, or salmon pink matrix with smoky-gray or black quartz; Luster: Vitreous to pearly; Crystal structure: Trigonal (Quartz) & Monoclinic (Feldspar); Cleavage: Perfect in two directions for feldspar; Specific Gravity: 2.5-2.8
Formation & geological history
Formed from the simultaneous crystallization of quartz and alkali feldspar from a water-rich magma melt within a pegmatite vein during the final stages of magmatic cooling.
Uses & applications
Used primarily as decorative ornamental stone, in jewelry (cabochons), as architectural veneer, and as a collector's specimen due to its unique appearance.
Geological facts
Also known as 'Hebrew Stone' or 'Runite' because the dark quartz patterns embedded in the light feldspar matrix often resemble ancient runic, cuneiform, or Hebrew writing.
Field identification & locations
Identify by its distinctive 'script' patterns. Found in pegmatite-rich regions like the Black Hills (USA), Brazil, Russia (Ural Mountains), and Madagascar. Field identification relies on seeing the intergrown quartz 'characters' embedded in large feldspar crystals.
