TERMIUM Plus®

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AMETISTA [1 record]

Record 1 2004-11-29

English

Subject field(s)
  • Mineralogy
  • Gemmology
DEF

A transparent to translucent, purple to pale-violet variety of quartz common as a semiprecious gemstone.

OBS

The color results from a hole defect associated with ferric iron substitution for silicon.

French

Domaine(s)
  • Minéralogie
  • Gemmologie
DEF

Quartz pourpre ou violet utilisé en bijouterie.

CONT

[Le quartz] est, en général, incolore et complètement transparent, mais peut prendre des colorations des plus variées et devenir translucide et même opaque. Il y a lieu de citer [...] l'«améthyste», violet (Brésil, Oural) [...]

OBS

La couleur est due à des traces de manganèse.

OBS

améthyste : [...] dérive d'un mot grec dont la traduction est «qui préserve de l'ivresse».

Spanish

Campo(s) temático(s)
  • Mineralogía
  • Estudio de las gemas
DEF

Variedad de cuarzo en forma de cristales más o menos violáceos, cuyo tinte se atribuye a la presencia de ínfimas cantidades de óxido de manganeso.

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