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Gabbro is a rock that is made up of calcium rich plagioclase feldspar and pyroxene, usually augite. Gabbros are found in a variety of locations and have even been discovered on the moon. The colors of gabbro are typically dark gray to black with a medium to coarse texture and it is a favored medium in architectural designs.

Gabbro Polished
Gabbro Classification
Common Name Gabbro
Species Rock
Gabbro Optical Properties
Transparency Opaque
Optic Character NA
Optic Sign NA
Pleochroism None
Gabbro Characteristic Physical Properties
Inclusions Coarse grained crystals.
Luster Dull
Cleavage None
Gabbro Chemistry & Crystallography
Chemical Name mixture of pyroxene, plagioclase, amphibole, olivine and rarely silica
Crystal System NA
Chemistry Classification Rock

Gabbro Colors

  • Multi-color Gabbro Multi-color
  • Black Gabbro Black
  • Green Gabbro Green
  • Gray Gabbro Gray

Countries of Origin

New Zealand; United States of America (the); Italy; Madagascar; Nigeria; India; United Kingdom of Great Britain and Northern Ireland (the)


Normal care

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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.