Where is Epidote in Quartz found?
Epidote-Quartz
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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
Austria
Significant occurrences of well-formed epidote crystals, often associated with quartz, are found in the Knappenwand, Untersulzbachtal, Salzburg.
Pakistan
The Skardu region is known for producing high-quality epidote in quartz specimens, often with distinct green epidote crystals within clear quartz.
United States
Various localities, including California (e.g., Sierra Nevada foothills), Alaska, and North Carolina, have occurrences of epidote in quartz, particularly in metamorphic terrains.
Mexico
Some areas in Mexico, particularly those with skarn deposits, can yield epidote in quartz.
Norway
Certain metamorphic regions in Norway are known for epidote occurrences, sometimes intergrown with quartz.
Collecting tips
- Geological Context. Look for areas with regional or contact metamorphic rocks, especially those derived from mafic igneous rocks or impure limestones. Hydrothermal alteration zones are also promising.
- Associated Minerals. Epidote in Quartz is often found with other metamorphic minerals such as actinolite, chlorite, garnet, calcite, and various feldspars.
- Visual Identification. Search for green, needle-like or prismatic crystals embedded within clear, white, or smoky quartz. The distinct green color of epidote is a key indicator.
- Veins and Fractures. Check quartz veins and fractures within metamorphic host rocks, as epidote often crystallizes in these settings.
Quick Check
- Color:
- Green epidote inclusions in colorless, white, or smoky quartz.
- Luster:
- Vitreous (glassy).
- Streak:
- White (for quartz), grayish-white (for epidote).
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