6 New Jewelry Testing Solutions. This is a new set of 6 testing solutions. Everything you need to appraise 10k, 14k, 18k, 22k, silver and platinum. These are the finest acids made today. Each bottle has 1/2 fl oz of acid. The sturdy plastic bottles maximize safety and allows the user to easily squeeze out one drop at a time. You receive: One bottle of 10k testing acid. One bottle of 14k testing acid. One bottle of 18k testing acid. One bottle of 22k testing acid. One bottle of silver testing acid. One bottle of platinum testing acid. Acid Test Stone. This is a new acid testing stone. This stone is used to test 10k, 14k, 18k and silver. Use this stone with acid solutions. It measures approximately 1 7/8" x 1 7/8" x 3/16" (47 x 47 x 5 mm).