Glass and crystal both start as a transparent material that is made from natural materials including sand, limestone, and soda ash. Crystal, however, also has lead oxide, barium oxide, zinc oxide ...

Xiaomi Dragon Crystal Glass is a new type of smartphone screen glass that is 10x more resistant to falls than conventional reinforced glass.

During glassmaking, a crystal is liquefied (melted) and then suddenly cooled (quenched) to prevent the glass from becoming too organised.