Check the listing for details. GTE GOLD TEST STONE Silver Platinum Testing Scratch Tester Touchstone Metals. Color: Silver, Condition: New. Listed at 9.25 USD. FAST FREE SHIPPING! The following is included with each purchase: Quantity 1: GTE™ 3"x6" PREMIUM PRO TESTING STONE - $30 Retail Value!Essential for testing gold, silver, and platinum! These high quality testing stones can be washed and used again for hundreds of tests. They've been designed specifically for testing and leave a very visible streak when testing gold, silver, and platinum. Guaranteed to NOT damage the pieces you are testing. These stones have a rubber backing and are brand new in the original GTE Box. Warning: Most eBay Sellers sell random stones that were purchased at a home improvement store, which are not made for gold testing and do not work. This type of stone will also damage your piece. FAST SHIPPING! We ship orders within 24 hours RETURN POLICY: Most of the items we offer come with a long term manufacturer warranties but we also offer a 30 day no hassle return policy! Just send it back within 30 days and we'll give you a full refund no questions asked! Please message me with any questions! I'll be glad to call and explain things if necessary! .