metamorphic
Unakite (Tumbled)
Epidotized Granite
Hardness: 6–7 Mohs; Color: Mottled green (epidote), pink (orthoclase), and gray (quartz); Luster: Vitreous to dull; Crystal structure: Monoclinic/Trigonal; Specific Gravity: 2.85–3.20
- Hardness
- 6–7 Mohs
- Luster
- Vitreous to dull
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6–7 Mohs; Color: Mottled green (epidote), pink (orthoclase), and gray (quartz); Luster: Vitreous to dull; Crystal structure: Monoclinic/Trigonal; Specific Gravity: 2.85–3.20
Formation & geological history
Formed through the hydrothermal metamorphism of granite, where plagioclase feldspar is replaced by crystalline green epidote. Most specimens date back to the Precambrian era.
Uses & applications
Primarily used as a semiprecious gemstone for jewelry (cabochons, beads), decorative carvings, architectural facing (as 'Unakite Granite'), and metaphysical collecting.
Geological facts
It was first discovered in the Unaka Range of North Carolina, USA, from which it derives its name. It is one of the few rocks that is composed of three distinct mineral types visible to the naked eye.
Field identification & locations
Identify by its distinctive 'pistachio green' and 'salmon pink' mottling. Commonly found in riverbeds and glacial till across the Blue Ridge Mountains of the USA, as well as in South Africa and Brazil.
More like this
