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 not see "Amethyst" in the dark. When the battery opened fire, the fire was directed at the "Kiang Lin Liberation" which was sunk by the gun fire, with heavy civilian casualties. At 0500 hours on 31 July, "Amethyst" approached the PLA forts at Par Shan (Baoshan) and Woosung (Wusong) which had their searchlights sweeping the river. At 0525 a planned meeting with the destroyer took place, at which point "Amethyst" sent the signal "Have rejoined the fleet south of Woosung. No damage. No casualties. God save the King". "Concord" had been ordered to prepare to provide gun support to "Amethyst"