Mingder Mineral Ore Color Sorter Machine-- www.hefeimd.com --can sort calcite, calcium carbonates, potash feldspar etc. with high capacity and high accuracy, welcome to our factory to test our machine ! Pls contact me at: 0086-551-62578095 Mobile/whatsapp: 008613966725592 Skype: dianahongsmile hefei Mingde Optoelectronic Technology Co., LTD