SAMATHA ~ Adjustable Natural Amethyst Ring Material: Rhodium-plated silver plated brass Amethyst belongs to the family of crystalline quartz and owes its violet color to the presence of traces of iron inside. Colours. Purple, in all degrees of intensity. Amethyst is one of the best known and most popular gemstones. Thanks to its color and brilliance, this precious stone (once called semiprecious stone) is widely used in the jewelry industry. AMETHYST PROPERTIES: Amethyst is a moonstone (Yin) that awakens in us the feminine aspect of the Universe: higher intuition. It is the door to our supreme inner fulfillment, it is the stone for rediscovering our true Self.