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 limited series (identified by DC Comics as a "maxi-series") establishes Gemworld, Amethyst's identity, and introduces several of her recurring villains. The limited series was followed by a 1984 annual and a sixteen-issue ongoing series. The ongoing series was followed by the 1986 "Amethyst Special" one-shot and a four-issue limited series that ended the character's adventures (pencilled by Esteban Maroto). There was also a one-shot with Superman in "DC Comics Presents" #63 (Nov. 1983). The character re-emerged in 2005 after 18 years of sporadic appearances, in the "Infinite Crisis" mini-series. In June 2012 it was announced that Amethyst would make her