Crystals, as we know them in their industrial applications were discovered in the 17th century. They are traditionally hand blown. Crystals are manufactured through the same process as that of glass forming; the only difference is that instead of soda ash, lead oxide is used. For glass to be considered crystal, it must be at least 10 % lead. The result is a heavier, clearer and more lustrous glass-like substance. It can be cut to take many shapes and forms -- making it ideal for many applications, including fashion accessories.

The quality of crystals is judged by the pitch of the