igneous
Garnetiferous Granite
Garnet-bearing leucogranite
Hardness: 6-7.5 (Mohs), Color: Creamy white to gray with burgundy garnets and black biotite veining, Luster: Vitreous when polished, Structure: Phaneritic (coarse-grained) with occasional gneissic foliation.
- Hardness
- 6-7
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Physical properties
Hardness: 6-7.5 (Mohs), Color: Creamy white to gray with burgundy garnets and black biotite veining, Luster: Vitreous when polished, Structure: Phaneritic (coarse-grained) with occasional gneissic foliation.
Formation & geological history
Formed from the slow cooling of silica-rich magma deep within the Earth's crust, often during orogenic (mountain-building) events. The presence of garnets suggests high-pressure metamorphic influences or peraluminous magma composition.
Uses & applications
Widely used for kitchen countertops, flooring, monuments, and decorative architectural cladding due to its durability and aesthetic appeal.
Geological facts
This specific pattern is often commercially known as 'White Ornamental' or 'River White' granite. The small circular burgundy spots are actually individual garnet crystals.
Field identification & locations
Identify by looking for the distinct 'peppered' look of black mica and red garnets against a light feldspar and quartz background. Common in continental crust and major mountain ranges like the Himalayas or Appalachians.
