This professional gold testing kit provides everything you need to accurately determine the karat content of your gold jewelry and items. The set includes 5 bottles of essential testing solutions 10K acid solutions - each in a generous 3/4 ounce (22ml) bottle that's good for hundreds of tests. The kit comes complete with a step-by-step instructions. The testing process is straightforward: simply create a mark on the stone with your gold item and apply the testing solution to determine the karat purity. The solutions are carefully packaged in secure, vacuum-sealed bottles for safe handling and storage. T