GTE Gold Testing Kit ? Featuring Genuine JSP Acids Accurate Testing Guaranteed | Trusted by Professionals What?s Included: JSP 10K Gold Testing Solution (0.5 oz) JSP 14K Gold Testing Solution (0.5 oz) JSP 18K Gold Testing Solution (0.5 oz) JSP 22K Gold Testing Solution (0.5 oz) ? Each bottle is factory-sealed and provides up to 400 tests ? Distributed by GTE ? Gold and Silver Testing Equipment ? Printed Instruction Booklet Included with Full-Color Reaction Chart ? Testing stone not included How to Use: Rub your gold item firmly against a test stone to leave a clear streak. Apply a drop of the appropriate JSP testing solution onto the streak. Watch the chemical reaction: If the streak stays visible, the item is at least the karat level tested. If the streak fades or disappears, it?s less than the karat being tested. Example: If the mark holds firm with the 18K acid but fades with the 22K acid, your item is most likely 18K gold. Why Choose GTE JSP? Fresh, genuine acids from the most trusted name in testing solutions Clear, easy-to-follow printed instructions with visual color chart Ideal for testing jewelry, coins, scrap, bars, and more Suitable for professionals, collectors, or home use