igneous
Pink Granite (Gneissic Granite)
Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)
Hardness: 6-7 (Mohs); Color: Pink to salmon orange with gray/black specks; Luster: Dull to vitreous; Crystal structure: Phaneritic (visible grains); Specific gravity: 2.63-2.75
- Hardness
- 6-7 (Mohs)
- Color
- Pink to salmon orange with gray/black specks
- Luster
- Dull to vitreous
Identified More igneous →
Explore Pink Granite (Gneissic Granite) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-7 (Mohs); Color: Pink to salmon orange with gray/black specks; Luster: Dull to vitreous; Crystal structure: Phaneritic (visible grains); Specific gravity: 2.63-2.75
Formation & geological history
Formed through the slow crystallization of magma below Earth's surface. This specimen shows slight foliation (alignment of minerals), suggesting it may be a gneissic granite formed under high pressure. Geological age can range from Precambrian to Cenozoic depending on location.
Uses & applications
Used widely in construction as dimension stone, countertops, floor tiles, and as crushed aggregate for roads. Polished specimens are used for monuments and grave markers.
Geological facts
Pink granite gets its distinctive color from an abundance of potassium feldspar (orthoclase). It is one of the oldest and most durable rocks found on the Earth's crust.
Field identification & locations
Identify in the field by its 'salt and pepper' appearance mixed with pink hues and its inability to be scratched by a steel blade. Commonly found in continental crystalline basements and mountain ranges.
