Amethyst in Semi-Polished Agate Geode, Uruguay
10" x 7" x 4.5" / 9.67 lbs
Amethyst (SiO2) is a purple variety of quartz. The characteristic purple color is created when trace amounts of iron are irradiated (from the natural radiation in rocks). Price is based upon three factors: weight, shape & color. This museum-quality specimen has NOT been heat-treated, unlike artificially enhanced (Brazilian) amethyst; it was mined in the northern region of Uruguay’s Artigas Department, the premier source of fine quality amethyst. Collected by Cory Cotter, PhD (2016). Free Shipping in 48 States.