metamorphic
Jasper with Epidote (Unakite-related)
Epidotized Quartzite (composed of Quartz, Epidote, and Feldspar)
Hardness: 6-7 (Mohs scale); Color: Mottled green (epidote) and reddish-brown to orange (feldspar/iron oxides); Luster: Vitreous to dull; Crystal structure: Microcrystalline; Cleavage: None/Conchoidal fracture.
- Hardness
- 6-7 (Mohs scale)
- Luster
- Vitreous to dull
Identified More metamorphic →
Explore Jasper with Epidote (Unakite-related) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-7 (Mohs scale); Color: Mottled green (epidote) and reddish-brown to orange (feldspar/iron oxides); Luster: Vitreous to dull; Crystal structure: Microcrystalline; Cleavage: None/Conchoidal fracture.
Formation & geological history
Formed through the hydrothermal metamorphism of granitic rocks, where plagioclase feldspar is replaced by epidote. This process occurred during various mountain-building events (orogenies) globally.
Uses & applications
Used primarily as a gemstone for cabochons, beads, and carvings. Also used as a decorative stone for architectural features and landscaping.
Geological facts
This specimen appears to be a river-worn pebble. While similar to Unakite, the dominance of green epidote and iron staining suggests it is a high-epidote metamorphic jasper, often found in glacial till.
Field identification & locations
Identify in the field by its distinct green and orange/red mottling and its high hardness (it will scratch glass). Commonly found in riverbeds and on beaches in the Great Lakes region and the Appalachian Mountains.
More like this
