Where is Epidote in Quartz found?
Epidote-Quartz rock
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Open the appEpidote in Quartz 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 Quartz
Alps (Europe)
Known for excellent epidote specimens, often associated with quartz in metamorphic rocks.
Pakistan
Produces fine epidote crystals, sometimes in quartz matrices.
United States (e.g., California, Alaska)
Occurrences in metamorphic belts and altered igneous rocks.
Mexico
Found in various metamorphic and hydrothermally altered settings.
Norway
Known for epidote occurrences in metamorphic rocks.
Collecting tips
- Target Metamorphic Terrains. Focus on areas known for regional or contact metamorphism, particularly those with mafic igneous protoliths or impure limestones.
- Look for Green Veins or Patches. Epidote's distinctive green color makes it stand out against lighter quartz. Look for green streaks, veins, or disseminated grains within quartz-rich rocks.
- Check Hydrothermal Alteration Zones. Epidote is a common product of hydrothermal alteration, so examine areas around mineralized veins or altered igneous intrusions.
- Examine Road Cuts and Outcrops. Freshly exposed rock faces often reveal the internal texture and mineralogy more clearly.
Quick Check
- Color:
- Green (epidote) and white/gray/clear (quartz)
- Luster:
- Vitreous
- Streak:
- White (for both epidote and quartz)
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