Home Scrap Jewelry Testing Kit-Silver Gold Platinum-With Pro Deluxe Test Stone Surface &#9989; Extra large professional quality deluxe test stone surface &#9989; Six (6) half-ounce bottles of PuriTEST test acids- 10k, 14k, 18k, 22k, Silver, Platinum Testing Acids &#9989; Test stones are used to test your gold jewelry without ruining it, by using the stone to test instead of directly on the piece itself. &#9989; Genuine PuriTEST acids guaranteed fresh &#9989; Box sealed with shrink-wrap