Slice of amethyst from an unusual stalactite , Jalgaon District , Maharashtra , India. Size: 8.2×7.5×0.3 cm. Slice through a star-shaped stalactite from Artigas , Uruguay . Size: 7.1×6.6×0.5 cm. An unusual tabular amethyst crystal, from Brandberg District, Erongo Region , Namibia . Detail, overall size: 5.7×1.8×1.6 cm. Citrines Citrine, Boekenhoutshoek