What is American Brilliant cut glass?

American Brilliant cut glass is deeply and sharply cut glass known for its reflective quality and highly polished nature. This type of glass is thick, heavy, and very clear.

The difference between cut glass and cut crystal is the lead content along with some other criteria. "There are three primary criteria for crystal as established by the European Union in 1969: a lead content in excess of 24%, a density in excess of 2.90 and a reflective index of 1.545." "Prior to 1969 crystal glass was generally around 36% lead. However, due to concerns over lead leaching the percentage was reduced to the [unofficial} standard of 24%. Today glass with a lead content of 10% or more is considered to be crystal or “fine glass”" in the US.