metamorphic
Unakite or Red Jasper in Epidote
Unakite (Metasomatized Granite)
Hardness: 6.0-7.0 (Mohs scale), Color: Mottled green (epidote) and pink/red (orthoclase feldspar/jasper), Luster: Vitreous to dull, Crystal Structure: Monoclinic/Triclinic mixture, Cleavage: Imperfect
- Hardness
- 6
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Physical properties
Hardness: 6.0-7.0 (Mohs scale), Color: Mottled green (epidote) and pink/red (orthoclase feldspar/jasper), Luster: Vitreous to dull, Crystal Structure: Monoclinic/Triclinic mixture, Cleavage: Imperfect
Formation & geological history
Formed through the hydrothermal alteration of granite where plagioclase is replaced by epidote. It is often found as river stones or glaciated pebbles. Most common in Precambrian to Paleozoic formations.
Uses & applications
Used in lapidary work for cabochons, beads, decorative carvings, and architectural veneer. It is a popular stone for metaphysical or healing practitioners.
Geological facts
Unakite was first discovered in the Unaka Range of the Blue Ridge Mountains in the United States. While it contains orthoclase, some specimens are exceptionally rich in red jasper, creating a striking contrast against green epidote.
Field identification & locations
Identify in the field by its distinct 'pistachio green' and 'salmon pink' or 'brick red' color combination. Often found in riverbeds in Virginia, North Carolina, and the Great Lakes region. Look for a hard stone that cannot be scratched by a steel knife.
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