Amethyst is not primarily defined by carat weight; this is different to most gemstones where the carat weight exponentially increases the value of the stone. The biggest factor in the value of amethyst is the color displayed. The highest grade amethyst (called "Deep Russian") is exceptionally rare and therefore, when one is found, its value is dependent on the demand of collectors. It is, however, still orders of magnitude lower than the highest grade sapphires or rubies (padparadscha sapphire or "pigeon's blood" ruby). Amethyst Amethyst is a violet variety of quartz. The name comes from the Koine Greek ἀμέθυστος "amethystos" from
Amethyst Rock Star conform to the conventions of any of them." Credits adapted from liner notes. Musicians Technical personnel Amethyst Rock Star Amethyst Rock Star is the debut solo studio album by Saul Williams. It was released by American Recordings in 2001. It peaked at number 135 on the French Albums Chart. Steve Kurutz of AllMusic gave the album 1.5 stars out of 5, saying: "Some of the language is downright laughable (see the trite themes of 'Fearless' for example) in any context, and the rest is mediocre at best." Kitty Empire of "NME" gave the album 3.5 stars out of 5, calling