Quartz Prism Polished - 157.60kg - Height: 53cm. This Crystal Quartz was mined from the Norcross-Madagscar (NMG) quarry. You will receive this Quartz Prism Polished with this order. It's better to buy your Crystal Quartz Prism - Polished from your direct source of Crystal Quartz. For further information, please call a Madagascar Minerals® sales representative (520) 882-8884.