Editorial Review Measuring at 8" x 3" x 1/2", this black testing stone is to be used with solutions and testing needles in order to determine the karat value and purity of your precious metals.Please contact us with any questions. Thanks for looking!
Specification Binding : Office Product Brand : PMC Supplies LLC Label : PMC Supplies Manufacturer : PMC Supplies Model : TEST-0020 ProductGroup : Art and Craft Supply ProductTypeName : ART_AND_CRAFT_SUPPLY Publisher : PMC Supplies Studio : PMC Supplies Title : Large 8" x 3" x 1/2" Black Testing Stone for Gold Platinum Silver Test Karat Value Purity Jewelry Scrap Precious Metal