This is a stunning, 9.5" wide cluster of light, amethyst crystals from the mines in Minas Gerais, Brazil. The crystals are in excellent condition with wonderful terminations, some of which have been polished to remove imperfections. The plate makes for a gorgeous display piece and sits nicely on any flat surface.
Amethyst is a purple variety of quartz (SiO2) and owes its violet color to natural irradiation, iron impurities, and the presence of trace elements, which result in complex crystal lattice substitutions. It’s considered a semi-precious gemstone, and just two centuries ago was considered to have a value on par with diamonds, sapphires and rubies.
Much of the world’s amethyst
comes from extensive deposits in Southern Brazil that have been heavily mined for about a century. The amethyst occurs in large cavities or geodes
within volcanic rocks and the coloration and crystal size can vary greatly.