What is the difference between glass and crystal?
<answer> Crystal is heavier than glass due to its lead content, but glass is often thicker to the touch than crystal. <context> Crystal is heavier than glass due to its lead content, but glass is often thicker to the touch than crystal. A delicate, paper-thin rim indicates the piece is crystal since it can be blown thinner than glass. Run your fingers along the cuts in the glass or crystal piece. Crystal etching results in rounder edges, while cut glass has sharp, edgier cuts. When blowing crystal, the high lead content makes it softer and easier to shape and mold. The creative and varied shapings found in crystal are a direct result of its lead content.