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>> Group(s) : pyroxenes, silicates
See the pictures :

Found in 1821 by P.Ström and named "acmite" from the Greek "point, edge" in reference to the typical pointed crystals.
But in 1835 Berzelius named it aegirine after Aegir, the Teutonic god of the sea.
Richer in sodium than augite, it oxydizes itself, pruducing chlorite, one of the main inclusions in quartz.

Exploited sites

Found in Norway where it had been discovered (Rundemyr), in France (Montgenèvre close to Briançon, Valette close to Riom in the Cantal department, Azinières close to Millau in the Aveyron department).
Also found in Canada (Mont Saint-Hilaire), in Zambia, in Brazil, in the USA, in China, in Mongolia...

See pictures of the mines / other pictures

Use in jewelry

Faceted or cabochon cut, like most of the dark stones.

Looking alike stones

diopside , epidote , gadolinite , kornerupine , tourmaline , vesuvianite

Historical healing properties

It would increase the will to fight against external aggressions, both physical and mental. It would promote people returning to their personal values and to the realities surronding them, protecting them from negative influences. It would help in following personal convictions and morality and to do that which is required; it actually provides the strength for one to be true to oneself and strengthen integrity and conviction. This would be the stone of the will power, of the morality.
On the heart chakra aegirine would bring liberty of thought, free will, independence, lucidity. Same as epidote, it is related to the liver and to the gall bladder on which it would act positively.

Chemical characteristics

inosilicate of sodium and iron

Physical characteristics

Main color : green

Other colors : black

very strong bottle green

Color of streak : grey, yellow, green

Luster : vitreous, resinous

Hardness : 6.0

Density : 3.40 to 3.55

Cleavage : good

Fracture : uneven

Optical properties

Transparency : translucent, opaque

Refractive Index : 1.700 - 1.800

Double refraction : 0.030

Definite, biaxial (-)

visible double refraction : no

Dispersion : +

Pleochroism : definite

Number of colors : 3

Strong green, yellow green, brown

Fluorescence : none


Elongated prismatic up to 20 cm, acicular crystals


Crystal system : monoclinic

Other informations
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