Metal Test Stone, Professional Jewelry Gold Testing Touchstone, Detecting Stone Accessory(Superior)

Professional Testing Tool: Specially designed for accurately verifying gold content in various items, ensuring professional results every time. Color-Changing Acid Test: Simple to use, the included acid changes color based on purity, allowing for quick verification of gold's authenticity. Versatile Application: Ideal for testing jewelry, coins, antique gold, silver, collectibles, and more. Ensure your valuables are genuine and reliable. Real Gold Assurance: The acid test will preserve real gold on the touchstone while dissolving or oxidizing fake pieces into blue, guaranteeing your investments. Available Varieties & Size Options: Choose between two types (Common and Superior) with sizes to fit your needs; the Superior model measures 6cm x 3.4cm for ease of use. gold tester jewellery testing kit silver coin for and goldtestingvlewed stone kasoti large test 10 14 k auracle pro stones 24k carat purity rock chalk 10k acid 14k 18k 22k karat keegold premium