Amethyst element impurities), and the presence of trace elements, which result in complex crystal lattice substitutions. The hardness of the mineral is the same as quartz, thus it is suitable for use in jewelry. Amethyst occurs in primary hues from a light pinkish violet to a deep purple. Amethyst may exhibit one or both secondary hues, red and blue. The best varieties of amethyst can be found in Siberia, Sri Lanka, Brazil and the far East. The ideal grade is called "Deep Siberian" and has a primary purple hue of around 75–80%, with 15–20% blue and (depending on the light source)
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