What Is Lead Crystal Glass?

For collectors, enthusiasts, and even general consumers, the term "lead crystal" invokes high quality. What is it about lead crystal that makes it so appealing? And what, exactly, makes crystal "lead crystal"?

Identification

In order to qualify as lead crystal, the object in question must be not only made of lead glass, but also cut (by either machine or hand) into facets.

Manufacture

Lead glass is created by using lead oxide as a modifier and stabilizer during the manufacturing process. This differs from normal glass, which uses such chemicals as calcium or potassium oxide.

Significance

The use of lead oxide increases the refractive qualities of the glass, giving lead crystal its distinctive, bright rainbow refraction.

History

British businessman George Ravenscroft is credited with discovering the manufacture of lead crystal in the 17th century.

Warning

It is possible for a lead crystal container to transfer some of its lead content to beverages, if the liquid is left in the container long enough (such as wine stored in a lead crystal decanter).

Resources

• Collectible lead crystal