What is a diamond simulant originally made from crystal glass called?

A rhinestone, paste or diamante is a diamond simulant originally made from rock crystal but since the 19th century from crystal glass or polymers such as acrylic. Originally, rhinestones were rock crystals gathered from the river Rhine, hence the name, although some were also found in areas like the Alps, but today the name "rhinestone" applies only to varieties of lead glass known as crystal glass. Rhinestones can be used as imitations of diamonds, and some manufacturers even manage to partially reproduce the glistening effect real diamonds have in the sun.