This 10K, 14K, and 18K Gold Testing Solution Kit includes a scratch stone tester and neutralizer for precise, reliable testing of gold. The solution comes in a 12-gram plastic bottle with a leak-proof design for controlled application. The scratch stone allows jewelers to test carat content accurately, while the included acid test neutralizer cleans the test stone and prevents contamination. This kit is perfect for professionals, ensuring safe and efficient testing while protecting against staining and burns.