Where is Epidote in Epidosite found?
Epidote (Ca2(Al,Fe)3(SiO4)3(OH)) in Epidosite (metamorphic rock composed primarily of epidote and quartz)
Got a photo? Identify rocks instantly with the Rockby app
Open the appEpidote in Epidosite occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Epidote in Epidosite
Alps (Europe)
Well-known for occurrences of epidote and epidote-rich rocks due to extensive Alpine metamorphism.
Sierra Nevada (California, USA)
Associated with metamorphosed mafic volcanic and intrusive rocks.
Appalachian Mountains (Eastern USA)
Found in various metamorphic belts.
Ophiolite Complexes Worldwide
Commonly found in altered oceanic crust sections, where mafic rocks have undergone hydrothermal alteration and metamorphism.
Collecting tips
- Look for Green Rocks. Epidosite's distinctive pistachio-green color is a key indicator. Search in areas known for metamorphic rocks, especially those derived from mafic protoliths.
- Check for Hardness. Epidote is relatively hard (6-7 on Mohs scale), so the rock will resist scratching with a steel knife. Quartz (7) also contributes to the hardness.
- Examine Crystal Habit. Look for prismatic or granular green crystals within the rock matrix, which are characteristic of epidote.
- Consider Geological Context. Epidosite is typically found in metamorphic terranes, often associated with greenschist facies rocks, amphibolites, and altered mafic igneous rocks.
Quick Check
- Color:
- Pistachio-green to yellowish-green
- Luster:
- Vitreous to resinous (for epidote crystals), duller for the rock
- Streak:
- White to grayish-white
Explore Epidote in Epidosite
Identify rocks anywhere
Free on iOS, Android, and Web. Photo identification, full database, and your personal collection.