This polished “lense quartz” is from Curvelo in Minas Gerais, Brazil. It is a natural transparent quartz that contains inclusions of colorful minerals including clays, chlorite, hematite and others. It has been polished to a gem luster. The various crystal and mineral formations in the quartz resemble fantasy landscapes. It measures 2 x 1 1/8 x 1 1/8 inches or 50 x 28 x 28 mm.