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

Identified February 4, 2026More igneous →

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Physical properties

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.

Other igneous specimens

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Blue Apatite

Fluorapatite (Ca5(PO4)3F)

mineral

Dark Igneous Rock (Likely Basalt or Diabase)

Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.

Igneous

Magnetite

Iron(II,III) oxide (Fe3O4)

mineral

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

mineral

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

mineral

Magnetite

Magnetite (Fe3O4)

mineral