TERMIUM Plus®

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HELIODOR [1 record]

Record 1 2022-06-30

English

Subject field(s)
  • Mineralogy
  • Gemmology
Universal entry(ies)
Be3Al2Si6O18
formula, see observation
CONT

Heliodor is a name used by mineralogists and gemologists for specimens of the mineral beryl with a yellow, greenish-yellow, or golden-yellow color. Pure beryl is colorless, but impurities within the mineral cause beryl to occur in a variety of ... colors. The yellowish colors of heliodor are usually caused by small amounts of iron within the mineral's crystal structure.

OBS

Chemical formula: written Be3Al2Si6O18

French

Domaine(s)
  • Minéralogie
  • Gemmologie
Entrée(s) universelle(s)
Be3Al2Si6O18
formula, see observation
CONT

La pierre héliodore est un minéral naturel de la famille des cyclosilicates. C'est une variété de béryl de teinte jaune avec des nuances verdâtres ou miel. [...] Elle présente la plupart des caractéristiques du groupe des béryls : elle a une dureté importante de 7,5 à 8 sur l'échelle de Mohs, une structure cristalline hexagonale, un clivage imparfait et une cassure conchoïdale.

OBS

Formule chimique : s'écrit Be3Al2Si6O18

Spanish

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