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 RPG also takes into account the disruption of modern technology by magic; the more technologically advanced an item is, the more likely that the Enchantment Disruption Field that encompasses the globe will affect it. Rules in detail are provided for all facets of technological and magical interaction. "Amethyst" was originally published under 3.5 rules and recognized with an Honorable Mention for Best Setting in the 2008 Gen Con ENnie Awards. "Amethyst: Foundations" by Chris Dias was previewed at Free RPG Day of 2009, and then published by 2010 by Goodman Games as a new science fantasy setting for 4th edition "Dungeons