full lead cry·stal | ˈfu̇l-kət kri-stᵊl
noun
The finest man-made crystal, with a high lead oxide content that serves to enhance its natural color spectrum
Full lead crystal is considered the finest of the man-made crystal variants. First produced in the 17th century, lead crystal was developed by George Ravenscroft, who experimented with adding lead to the glass to eliminate the imperfections that were commonly present. Full lead crystal is made from silica sand, soda, lime, and manganese and lead is added to create the crystal glass. Colors may be added as well. To be considered full lead crystal, a piece must have at least 24% lead. Other factors that influence the perceived quality and cost of the crystal include the presence of bubbles or seeds in the glass. These pieces are generally considered safe to use for eating or drinking.
