GOLD TEST EMPIRE This EASY to use genuine PuriTEST kit will determine the karat value and purity of Silver Jewelry, scrap, bars, coins, and much more! Simply scratch the test stone with your jewelry and apply a drop of the acid to the stone and watch the results appear! *Our goal is to make testing your jewelry FUN, FAST, and EASY! *We promise that our acids are guaranteed to be FRESH! *Each bottle will test hundreds of times! *These small bottles are perfect for traveling with or carrying in a purse or briefcase. Quick & easy to use; instructions included. *A MUST-HAVE for anyone who invests in silver! This 3 Piece kit includes: - PuriTEST sealed Silver Testing Acid Solution 0.5 oz. (14 g)- PuriTEST 2''x2'' Test Stone New in Box with Rubber backing to ensure non-slip desktop testing!- Easy to read and follow instruction booklet! These small bottles are perfect for traveling with or carrying in a purse or briefcase. Quick & easy to use; instructions included. NOTE: These solutions will dull the polishing of the piece, andleave a mark where the acid was placed. It is advised to always use a test stone to protect your jewelry. If you have any further questions, please feel free to contact us. We look forward to serving you in the future.