Pro-Quality Gold Test Stone- 6x3 inch large test stone

Large 6x3 inch Pro-Quality Testing Stone This large glass test stone includes a rubber grip backing. This test stone measures 6" x 3" x 1/4" *YOU CAN TEST SEVERAL PIECES AT ONCE WITH THIS EXTRA LARGE TEST STONE!* (Test Stones are used to test your gold jewelry without actually testing on the piece itself and ruining it. Instead you apply the acid to a mark that you rub on the test stone.) This stone allows to to test quicker by allowing you to test many items all at the same time!

• Smooth Black Glass Surface for easy reading of the test acids on this stone.
• Non slip pad on back to keep stone from sliding or scratching on table surfaces
• Large 6x3 tesing surface make it easy to test several items at once.
• This stone is used in conjunction with Gold test acids to determine if solid gold and karats
• Test stones are used to test your gold jewelry without ruining it, by using the stone to test instead of directly on the piece.