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What is Lead Crystal
Lead crystal, (also called crystal), is lead glass that has been hand or machine cut with facets. Lead oxide added to the molten glass gives lead crystal a much higher index of refraction than normal glass, and consequently much greater "sparkle". The presence of lead also makes the glass softer and easier to cut. Crystal can consist of up to 33% lead, at which point it has the most sparkle. The higher lead content also makes it much more difficult to form crystal during blowing.

Englishman George Ravenscroft discovered crystal in 1676.

Makers of lead crystal objects include Baccarat in France, Royal Leerdam Crystal of the Netherlands, Steuben Glass in the United States, Waterford Crystal in Ireland, Mikasa in Japan, and Swarovski in Austria

From Wikipedia, the free encyclopedia