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
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Epidote in Quartz before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
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.
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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Epidote in Quartz FAQs
How do I identify Epidote in Quartz?
Epidote in Quartz can be identified by its Pistachio-green to pale green color. Look for these key characteristics when examining specimens.
What color is Epidote in Quartz?
Epidote in Quartz typically appears in Pistachio-green to pale green, yellow, yellowish green, greenish yellow, greenish black, yellow-green in thin section. Color can vary depending on impurities and formation conditions.
