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Aegirine is a member of the pyroxene group along with jadeite. It is typically dark green to dark brown in color and crystals comonly have distinct terminations. It is rarely seen as a faceted gemstone, probably because it appears to be almost black due to its high saturation. It has good hardness at 6, and moderate to strong dispersion, when its saturation does not obscure it.

Aegirine Rough
Aegirine Classification
Common Name Aegirine
Species Pyroxene
Aegirine Optical Properties
Transparency Opaque-Translucent
Dispersion Strength: Moderate Fire
Refractive Index Over The Limit 1.720-1.839
Birefringence 0.037- 0.061
Optic Character Biaxial
Optic Sign Negative
Pleochroism Trichroic, emerald green, grass green, greenish brown, yellow, yellow-brown, green, deep green
Aegirine Characteristic Physical Properties
Hardness 6.0
Streak pale yellow gray
Toughness Fair
Luster Vitreous, Subvitreous, Resinous
Fracture irregular, uneven
Cleavage distinct, good
Aegirine Chemistry & Crystallography
Chemical Name Sodium Iron Silicate
Chemical Formula NaFe3+(Si2O6)
Crystal System Monoclinic
Chemistry Classification Silicate

Aegirine Colors

  • Green Aegirine Green
  • Black Aegirine Black
  • Brown Aegirine Brown

Countries of Origin


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Tim Matthews


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.