This EASY to use genuine JSP GTE test kit will determine the karat value and purity of Gold 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 gold and silver! This 5 Piece kit includes: - JSP 9K Gold Testing Acid Solution 0.5 oz. (14 g) - GTE 2''x2'' Test Stone with rubber backing for non-slip desktop testing! Easy to follow instruction booklet with color chart!