Quartz Stalactite Slice (3-5cm). This Quartz Crystal was mined from the Norcross-Madagascar Quartz quarry. You will receive 4 bags (100pcs) of Quartz Stalactite Slice (3-5cm), similar to what is photographed, with this order. $5.50./pc. For more information, please call a Madagascar Minerals® sales representative (520) 882-8884. It's better to buy your Quartz from your direct source of quartz.