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 Incident go from Shanghai to Kiangyin, 40 miles down river from the "Amethyst". "Consort" reached the "Amethyst" at about three in the afternoon and was immediately fired upon. She found the fire too heavy to approach "Amethyst" and therefore passed her at speed down river. She turned two miles below and again closed "Amethyst" to take her in tow. But again she came under such heavy fire that she was obliged to abandon the attempt, although she answered the shore batteries with her full armament (including 4.5-inch (114 mm) guns) and soon signaled that she had silenced most of the opposition.