Purple Amethyst Crystal Flower from Ametista do Sul, Brazil tumbled stones as in Fenster Quartz

as in Fenster Quartz

Pyrite after pyrrhotite (psuedomorph)

Vibrant pink tourmaline crystal lot of 10 grams

Minor phlogopite also present

Purple Amethyst Crystal Flower from Ametista do Sul, Brazil tumbled stones as in Fenster QuartzThis stunning radial amethyst crystal "flower" comes from the renowned amethyst mines of Ametista do Sul, in Rio Grande do Sul, Brazil. Amethyst crystal flowers from Ametista do Sul formed over hundreds of thousands (or even millions) of years. They formed when silica saturated groundwater filled the narrow fissures in the basaltic volcanic rocks of the Serra Geral Formation (Lower Cretaceous in age). These beautiful amethyst crystals slowly