Aegirine

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Physical & Optical Properties

Mohs Hardness 6.0
Specific Gravity 3.5
Refractive Index 1.76 – 1.805
Crystal System Monoclinic
Cleavage Distinct
Color various
Birefringence 0.045

Mohs Hardness

Mohs Hardness: 6.0
1 Soft10 Hard

Crystal System

β a b c Monoclinic a ≠ b ≠ c, α = γ = 90°, β ≠ 90°

Value & Market

Price Tier Moderate ($50-500/ct)

About Aegirine

Aegirine is a deep green to black sodium iron pyroxene that forms sharply terminated, prismatic crystals in alkaline igneous rocks. Named after Aegir, the Norse god of the sea, it is found in significant deposits in Norway, Greenland, and Malawi. Its strongly pleochroic character—shifting from green to yellowish green depending on viewing angle—makes faceted specimens particularly desirable to collectors.

Jewelry Use

Durability 5/10

Science FYI Family

Frequently Asked Questions

What is Aegirine?
Aegirine is a deep green to black sodium iron pyroxene that forms sharply terminated, prismatic crystals in alkaline igneous rocks. Named after Aegir, the Norse god of the sea, it is found in significant deposits in Norway, Greenland, and Malawi. Its strongly pleochroic character—shifting from green
What is the hardness of Aegirine?
Aegirine has a Mohs hardness of 6.0, making it moderate for use in jewelry.
What color is Aegirine?
Aegirine is primarily Various.
How much does Aegirine cost?
Aegirine falls into the Moderate ($50-500/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Aegirine?
Aegirine belongs to the Monoclinic crystal system.

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