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
The Amethyst Ring The Amethyst Ring The Amethyst Ring by Scott O'Dell is the third novel in the historical fiction trilogy started by "The Captive" and "Feathered Serpent". Julián Estaban, who is impersonating the Mayan god Kukulcán, fights and escapes from a powerful gold hungry conquistador, Hernán Cortés. Kukulcán's followers captured Rodrigo Perdoza, a bishop carrying a message to Cortés to detain Julián. Julián wants to be a priest and asks the bishop many times to make him one, but in the end he lets the Mayan priest sacrifice him, and Julián takes the bishop's amethyst ring. Cortés attacks and captures Kukulcán's city,