For appraisal and testing of gold karats and silver. Wood case with five compartments contains set of 6 precious metal testing needles (8, 10, 12, 14, 18K, .999 for silver ), gold testing stone, and ready-to-use gold testing acid solutions. Gold testing solutions are for 10K, 14K, and 18K. Other solutions sold separately. Comes with a complete set of instructions for how to test gold and silver.