Unakite

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Unakite is a type of granitic rock that features mottled patterns of green epidote, white to gray quartz, and pink feldspar, occasionally with black veining. This compact, hard gem is most often seen as cabochon gems, carvings and beads or sold as tumbled rough.

Unakite Polished
Unakite Classification
Common Name Unakite
Species Rock
Unakite Optical Properties
Transparency Opaque
Dispersion Strength: None
Refractive Index 1.729-1.768
Optic Character NA
Optic Sign NA
Polariscope Reaction Aggregate (AGG)
Fluorescence SWUV: Inert
LWUV: Inert
Pleochroism None
Unakite Characteristic Physical Properties
Hardness 6-7
Specific Gravity 2.850-3.200 Typical:3.000
Toughness Fair
Inclusions Unakite has a mottled green and pink appearance with black, white or gray veining.
Luster Vitreous, Greasy
Fracture Granular, Uneven
Cleavage None
Unakite Chemistry & Crystallography
Chemical Formula Rock composed of green epidote, pink feldspar and white to gray areas of quartz
Crystal System NA
Chemistry Classification Rock

Countries of Origin

United States of America (the); Unknown; China; Brazil; South Africa; Australia; Indonesia

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Tim Matthews

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Tim Matthews

Tim Matthews is President and Chief Executive Officer of Jewelry Television® (JTV), as well as a member of the company's Board of Directors. He oversees and leads all aspects of the company's powerful omni-digital retail platform that uniquely specializes in fine jewelry and gemstones. His passion for business and gemstones has led him to become a recognized expert in the field of gemology. He is a life member of the Gemmological Association of Great Britain (Gem-A) and has earned Gem-A's highest degrees, the Gemmology (FGA) and Diamond (DGA) diplomas. He is also a Graduate Gemologist (GG) of the Gemological Institute of America (GIA) and has also completed GIA's Graduate Diplomas in Diamonds, Colored Stones and Pearls. Under his leadership, JTV has become the leader in the sourcing and selling of color gemstones and jewelry.

This page was created on June 27, 2014.

This page was last edited on October 24, 2019.