This complete gold testing kit delivers everything you need to accurately test the purity of metal jewelry without damaging the jewelry piece. Five 1/2-oz. pre-mixed testing acids (10K, 14K, 18K, 22K and platinum) in easy-to-access color-coded shatterproof bottles are included, along with one set of testing needles and one test stone. The kit is packaged in a wood organizer box that shuts securely with a magnetic closure.