Glass that's made with lead oxide. It gives the piece weight, shine and a clear ring when tapped. Glass with a lead oxide content of 24% is called "lead crystal." Glass with 30% or more lead oxide is called "full lead crystal."
Colorless, transparent glass resembling rock crystal. Must be 10% lead to be considered crystal.
High-quality glass that contains a minimum amount of lead oxide. The higher the lead oxide content, the higher the quality of 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.