quartz cryptocristallin

Domaine: géologiegemmologie
Auteur: Forget, Carl, 1980

Définition :

Variété de quartz alpha composée de grains et de fibres visibles au microscope seulement.

Note :

Dans le commerce et en gemmologie le quartz cryptocristallin est appelé calcédoine.

Terme :

quartz cryptocristallin n. m.

Traductions

anglais
Auteur : Forget, Carl, 1980
Définition

A variety of alpha quartz in which the grains and fibers are visible only under a microscope.

Note :

In trade and gemmology, cryptocrystalline quartz is called chalcedony.

Termes :
1. cryptocrystalline quartz
2. microcrystalline quartz
3. fine-grained quartz
4. fine-crystalline quartz
Microcrystalline quartz is the expression used in certain nomenclatures as opposed to macrocrystalline quartz.

Fine-grained quartz is used in opposition to coarse-grained quartz.