RS Mizar™ M18A9 Professional Gold Karat Tester -9-18 KaratProfessional grade electronic tester for 918K gold This user friendly kit is designed to accurately test gold from 9K to 18K. It can differentiate between gold plating and solid gold, and works on all colored gold alloys. The process is non destructive and also allows for platinum detection. The device features an automatic shut off function to help extend battery life and delivers results in just seconds. To use, simply place a few drops of the