This is a large amethyst plate from an important locality mined for specimens only in recent years, the Anahi mine high up several hundred miles east of the Andes in the Pantanal. The largest crystals measure to 15 cm. While many good plates have come out, it is difficult to obtain specimens of this size that have both some aesthetics in 3-dimensions, and aren't beat to heck by the laborious trip out of the mine, down the mountains on mule, to the boats, and to the market here. This one was personally brought out by an American dealer who had the rights to an exclusive on the mine for a number of years, and controlled much of its specimen production therefore. Diligence was taken which was not always the case, under this supervision.