Set of 4 Gold Silver Platinum Jewelry Tester Scratch Streak Stones to use with Acid Test Kits 10K 14K 18K 22K 24K Minerals Precious Metals Detector

Use with Jewelry Testing Acids to Determine the Karat Value and Purity of Gold, and Silver Jewelry, scrap, bars, coins, and much more! 3 Convenient Portable Stones Included-- Sizes: Small 2''x''2, Medium 4''x2'' and Large 6''x3'' Each Genuine GTE Black and White Test Stones includes a Rubber Backing for Non-slip Desktop Testing!.BONUS- GTE Neutralizer included to clean each stone. *Washable* These Test Stones Can be Used for Hundreds of Tests! International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions., Manufacturer: GTE