Epidote in Quartz
A variety of Quartz
What is Epidote in Quartz?
Epidote in Quartz is unusual material made from green, needle-like fibers or prismatic crystals surrounded by clear quartz. This silicate mineral is mostly used as a semi-precious stone. Although green is the most frequent color, it can vary from yellow-green to almost black. It often contains very small fibers of actinolite.
Optical Properties
- Refractive Index
- 1.544-1.553
- Birefringence
- 0.009
- Pleochroism
- Weakly dichroic
- Optical Character
- Biaxial positive
- Dispersion
- 0.013
Epidote in Quartz Market Value Calculator
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Epidote in Quartz Localities Map
See where Epidote in Quartz is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
Quick Facts
Physical Properties
- Color
- Pistachio-green to pale green, yellow, yellowish green, greenish yellow, greenish black, yellow-green in thin section
- Density
- 3.38 - 3.49 g/cm³
- Streak
- Gray
Chemical Properties
- Chemical Formula
- {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
- Elements
- Al, Ca, Fe, H, O, Si
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