Gold Testing Stone 150 x 75 x 15mm

Gold Testing - Precious Metal Testing Stones; When testing for gold, always suspect that the item could be plated.; Rub the stone over the piece to remove any plate on the item.; Apply the acid as required on the touchstone to test.; Applying testing acid directly on to the metal will discolour the item; therefore if a piece is returned to the customer there will be no acid; spoil inflicted on to the metal.;(Stone size may vary); Other Uses; After sharpening your gravers on a sharpening stone use a "Touch Stone" to achieve; a mirror finish, a better way than using conventional abrasive paper that could rip.; Use oil to obtain the best results.