igneous
Granite with Epidote
Phaneritic intrusive igneous rock with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
Hardness: 6-7 Mohs; Color: White and pink feldspar/quartz with green epidote stains; Luster: Vitreous to dull; Crystal structure: Phaneritic (visible interlocking crystals).
- Hardness
- 6-7 Mohs
- Color
- White and pink feldspar/quartz with green epidote stains
- Luster
- Vitreous to dull
Identified More igneous →
Explore Granite with Epidote in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-7 Mohs; Color: White and pink feldspar/quartz with green epidote stains; Luster: Vitreous to dull; Crystal structure: Phaneritic (visible interlocking crystals).
Formation & geological history
Formed by the slow cooling of silica-rich magma deep underground. The green epidote represents hydrothermal alteration of the original minerals (plagioclase or hornblende) by hot, mineral-rich fluids.
Uses & applications
Commonly used in construction as aggregate, dimension stone for countertops, and as decorative landscaping stone.
Geological facts
Epidote, the green mineral visible here, is often a sign of low-grade metamorphism or hydrothermal activity affecting the granite after it has already solidified.
Field identification & locations
Identified by the interlocking 'salt and pepper' texture of granite combined with distinct pistachio-green patches. Common in batholiths and mountain ranges globally.
