Lead glass
VARIETY OF GLASS IN WHICH LEAD REPLACES THE CALCIUM CONTENT OF A TYPICAL POTASH GLASS
Crystal glass; Crystal (glass); Lead crystal; Soda-lead glass; Lead Crystal
Lead glass, commonly called crystal, is a variety of glass in which lead replaces the calcium content of a typical potash glass. Lead glass contains typically 18–40% (by weight) lead(II) oxide (PbO), while modern lead crystal, historically also known as flint glass due to the original silica source, contains a minimum of 24% PbO.