Most star rubies today are synthetic. A star sapphire is a sapphire that exhibits an asterism in the form of a colorless, six-rayed star that reflects light. Star sapphires are cabochon cut. The step cut is generally used for colored stones. This cut is rectangular to square and has many facets parallel to the edges of the stone.
Sterling is quite malleable .
The original rhinestones were quartz stones obtained from the Rhine river. These stones were cut to resemble gemstones. It is usually polished and not faceted. This stone is not enhanced - massive stones are often found. This stone was named for Ken-ichi Sugi, the Japanese geologist who discovered it in 1944.