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IDOCRASE [5 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2022-07-12

English

Subject field(s)
  • Mineralogy
  • Gemmology
CONT

Vesuvianite is a mineral often found in rocks where igneous intrusions have penetrated limestone, dolomite, or marble. In this environment of contact metamorphism, recrystallized rocks near the margins of the intrusions often have a texture of interlocking grains without a preferred orientation.

French

Domaine(s)
  • Minéralogie
  • Gemmologie
DEF

Minéral [...] du système cristallin quadratique [qui] se présente en cristaux tabulaires ou prismatiques, striés longitudinalement, à éclat vitro-résineux, vert, jaune, brun rouge, parfois bleu ciel.

OBS

Avec un indice de dureté de 6,5 sur l'échelle de Mohs et bénéficiant d'un bel aspect translucide ou transparent, elle peut être utilisée comme une pierre précieuse selon sa matière et sa couleur. On la trouve dans de nombreuses régions du monde, avec des couleurs et des qualités différentes, et un indice de rareté qui va de peu commun à rare.

Spanish

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

Silicato de aluminio y calcio, con magnesio y hierro, que cristaliza en el sistema cuadrático; se encuentra en forma de cristales prismáticos, de color entre verde y pardo.

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Record 2 2016-02-26

English

Subject field(s)
  • Mineralogy
OBS

A variety of idocrase that is colored blue by copper.

French

Domaine(s)
  • Minéralogie
OBS

Variété bleue d'idocrase.

Spanish

Campo(s) temático(s)
  • Mineralogía
OBS

Variedad de vesubiana, de color azul verdoso, que contiene cobre.

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Record 3 2013-06-18

English

Subject field(s)
  • Mineralogy
DEF

A variety of vesuvianite or idocrase, occurring in yellowish crystals.

French

Domaine(s)
  • Minéralogie
DEF

Variété jaune d'idocrase.

Spanish

Save record 3

Record 4 2011-08-16

English

Subject field(s)
  • Mineralogy
DEF

A mineral of the cyclosilicate group which is formed by the contact of metamorphism of limestone or by pneumatolysis and which commonly occurs as glassy wedge-shaped triclinic crystals.

CONT

The next stage in the development of many deposits was the formation of volatile-bearing minerals such as amphiboles, epidote, idocrase, fluorite, tourmaline and axinite.

OBS

axinite: Named from the Greek meaning "axe," referring to the wedgelike shape of the crystals.

French

Domaine(s)
  • Minéralogie
DEF

Borosilicate d'aluminium, de fer, de manganèse, de calcium, se présentant en cristaux d'arêtes très vives, triclinique.

CONT

L'axinite [...] est un minéral qui prend naissance aux dépens des calcaires, dans les auréoles de contact des granites enrichis pneumatolytiquement en bore.

Spanish

Campo(s) temático(s)
  • Mineralogía
DEF

Borosilicato de aluminio y calcio, con pequeñas proporciones de hierro y de manganeso, que cristaliza en el sistema triclínico; sus cristales, de aristas cortantes, son de color pardo violáceo, a veces verdecidos por una capa superficial de clorita pulverulenta.

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Record 5 1977-05-18

English

Subject field(s)
  • Mineralogy
OBS

"Ditetragonal dipyramid"(...) is composed of sixteen triangular faces, each of which intersects all three of the crystallographic axes, cutting the two horizontal axes at different lengths.(...) Several common minerals crystallize in the ditetragonal-dipyramidal class. Major representatives are rutile, anatase, cassiterite, apophyllite zircon, and idocrase.

French

Domaine(s)
  • Minéralogie
OBS

[Une autre forme holoédrique du système tétragonal est] la "bipyramide octogonale" (...) avec seize faces, huit supérieures et huit inférieures, qui convergent en deux extrémités, une supérieure et une inférieure.

Spanish

Save record 5

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