Listing ID #3830671
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Contact SupplierThis premium quality Gold test stone is used for determine the carat content of jewelry. The object to be tested is scratched on the surface of the stone and a test acid solution determines the karat of the scratch.
023A | Gold testing black stone 2½" X 1½" X ½" |
023B | Gold testing black stone 3" X 2" X ½"mm |
023C | Gold testing black stone 4" X 2" X ½" |
023D | Gold testing black stone 6" X 3" X ½" |
023E | Gold testing black stone 8" X 3" X ½" |