Amethyst and it can not be differentiated with absolute certainty without advanced gemmological testing (which is often cost-prohibitive). There is one test based on "Brazil law twinning" (a form of quartz twinning where right and left hand quartz structures are combined in a single crystal) which can be used to identify synthetic amethyst rather easily. It is possible to synthesize twinned amethyst, but this type is not available in large quantities in the market. Single-crystal quartz is very desirable in the industry, particularly for keeping the regular vibrations necessary for quartz movements in watches and clocks, which is where a lot
Amethyst, Princess of Gemworld the Spectre on Gemworld in "Infinite Crisis" #2 and survived the attack. She later appears among the magical beings who are summoned to reconstruct the shattered Rock of Eternity in the "Day of Vengeance" Special. Amethyst is seen once again in "Infinite Crisis" #6 where she and other sorcerers pool their powers to summon the restored Spectre to Stonehenge. In the aftermath of Infinite Crisis, all of the other Lords of Order are apparently destroyed by the Spectre, signaling the end of the Ninth Age of Magic. Amethyst is currently the only known surviving Lord of Order in the Tenth