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Heliodor

heliodor
Rough heliodor

Heliodor, a yellow or golden yellow form of beryl, has always been linked with the Sun. Gem-quality specimens are occasionally found, but more usually inclusions of fine, slender tubes are present which are visible to the naked eye.

Heliodor is found associated with aquamarine in granitic pegmatites. The best-quality stones are found in the Urals (Russia). Brazilian heliodor is often a pale yellow and is step-cut to give depth of color. Heliodor from Madagascar is a finer color. Other localities include the Ukraine, Namibia, and the USA.

Heliodor Pictures

Heliodor rough crystals

Chemical Composition : Beryllium aluminium silicate
Crystal System / Forms :

Hexagonal


Cuts & Uses :

Marquise, Table, Baguette


Hardness : 7.5
Lustre : Vitreous
Refractive Index / Birefringence :

1.57-1.58 / 0.005


Sources :

Urals (Russia), Brazil, Madagascar, Ukraine, Namibia, and the USA.


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