igneous
Graphic Granite
Graphic Granite (Granitic Pegmatite)
AI-generated identification · may be incorrectHardness: 6-6.5 (Mohs scale); Color: Tan/yellowish background with dark needle-like inclusions; Luster: Vitreous to dull; Crystal structure: Macro-crystalline intergrowth; Specific gravity: 2.6-2.7
- Hardness
- 6-6
- Color
- Tan/yellowish background with dark needle-like inclusions
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-6.5 (Mohs scale); Color: Tan/yellowish background with dark needle-like inclusions; Luster: Vitreous to dull; Crystal structure: Macro-crystalline intergrowth; Specific gravity: 2.6-2.7
Formation & geological history
Formed through the simultaneous crystallization of quartz and feldspar from a silicate melt at the end stages of magma cooling. The patterns resemble ancient cuneiform or runes.
Uses & applications
Primarily used as a decorative stone in jewelry, landscaping, architectural veneers, and as a collectible geological specimen.
Geological facts
The name comes from the Greek word 'graphos' (writing) because the quartz crystals look like runes, cuneiform, or Egyptian hieroglyphics written on the feldspar matrix.
Field identification & locations
Look for a tan or pinkish feldspar matrix containing dark, angular, or rod-shaped quartz inclusions. Widely found in pegmatite districts globally, particularly in the United States, Russia, and Brazil.
