Crystal (glass)

See also: Crystal (homonymy)

Glass rich in Plomb (up to 40% and more) what causes of:

to lower its temperature of work
to increase its period of malleability
to increase its Hardness after cooling
to support the size and the polishing cold
to increase its glare by increase in sound Index of refraction.

Let us note that the term is misleading because it is about an amorphous material, it is thus not a Cristal with the physical direction.

See too

Crystal manufacture
the company Swarovski, which manufactures objects in this material.

External bond

Official site of crystal manufacture Valley Saint-Lambert (Belgium)

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