igneous
Granite or Pegmatite with Tourmaline
Granitic Pegmatite
AI-generated identification · may be incorrectHardness 6-7 (quartz/feldspar), white to light gray with black inclusions, vitreous to pearly luster, crystalline texture
Identified More igneous →
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Physical properties
Hardness 6-7 (quartz/feldspar), white to light gray with black inclusions, vitreous to pearly luster, crystalline texture
Formation & geological history
Formed from slow cooling of magma deep underground, often representing the last stages of magma crystallization where large crystals can grow.
Uses & applications
Used in construction, decorative stone, and as mineral specimens for collectors.
Geological facts
The black inclusions are likely schorl (black tourmaline), which is common in granitic pegmatites.
Field identification & locations
Identify by the coarse crystalline texture of quartz and feldspar, along with the distinct black, elongated or prismatic crystals of tourmaline.
