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>> Group(s) : silicates
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Described by Nordenskiold in 1833, its name coming from the Greek recalls its deceptive nature, close to the quartz with which it is often confused. Relatively rare, it is usually associated with beryl and topaz,

Exploited sites

It is found in France (Framont in the Vosges), in Brazil (Minas Gerais), United States, Mexico, Namibia, in Norway at Kragero (crystals of 20 cm long), Sri Lanka, Tanzania in Zimbabwe, in Mogok in Burma, Nigeria.

See pictures of the mines / other pictures

Use in jewelry

It is faceted for collection thanks to its hardness, and it is also used for jewelry, set like a solitaire as a diamond.

Daily care and precautions

Easy to care, low sensitivity to household products, is a stone that deserves to be known.

Looking alike stones

beryl , beryllonite , cerussite , rock crystal , danburite , jeremejevite , orthoclase , topaz

Historical healing properties

Stone of high energy, it would encourage meditation, would help to reach the higher consciousness. It would be the stone of clarification of the etheric and physical body that it enlightens.

Chemical characteristics

beryllium silicate

Physical characteristics

Main color : colourless

Other colors : yellow, pink

Color of streak : white

Luster : vitreous, greasy

Hardness : 7.5 to 8.0

Density : 2.95 to 2.98

Cleavage : indistinct

Fracture : conchoidal

greasy luster on the cleavage

Optical properties

Transparency : transparent

Refractive Index : 1.650 - 1.670

Double refraction : 0.016

Weak uniaxial positive

visible double refraction : yes

Dispersion : 0.015 (0.009)

Pleochroism : weak

Number of colors : 2

Requiring a stone of a deep color to be visible: colorless, yellow-orange

Fluorescence : weak

Green - bluish


well terminated short prismatic, transparent


Crystal system : trigonal

Other informations

Astrological sign : Aries, Virgo, Libra, Sagittarius

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  • Aries Aries
  • Virgo Virgo
  • Libra Libra
  • Sagittarius Sagittarius

helps comprehension