Diamonique is the brand name used by television shopping network QVC

QVC

QVC is a multinational corporation specializing in televised home shopping. Founded in 1986 by Joseph Segel in West Goshen Township, Pennsylvania, United States, QVC broadcasts in five countries as QVC US, QVC UK, QVC Germany, QVC Japan and – QVC Italy to 200 million households...

 for their cubic zirconia

Cubic zirconia

Cubic zirconia is the cubic crystalline form of zirconium dioxide . The synthesized material is hard, optically flawless and usually colorless, but may be made in a variety of different colors. It should not be confused with zircon, which is a zirconium silicate...

simulated diamond and other synthetic gem products (cubic zirconia is a common type of gemstone substitute). QVC acquired the manufacturing facilities, proprietary technology and trade name rights from MSB Industries, Inc. in 1988.

The name "Diamonique" was also used as the brand name of a synthetic garnet that was diamond-like in appearance and manufactured in the 1970s.