The Precious Metals Test Kit is a professional-grade testing solution for gold, silver and platinum. It includes a testing acid and stone to determine the composition of your precious metals. Get accurate and reliable results in seconds with this trusted kit. Contains 6 testing solutions to appraise 10k, 14k, 18k & 22k gold as well as silver and platinum. Each bottle has 1/2 fl oz of acid. Plastic bottles maximize safety and allows the user to easily squeeze out one drop at a time. Included: 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 natural obsidian, polished to accurately 10k, 14k, 18k and silver Measures 2″x1.5″ The kit will come with instructions but you will also receive an email with a link to download the instructions as we know many people like to have digital copies of instructions. Contains nitric acid and/ hydrochloric acid and/or potassium dichromate. It is not intended as a toy! Please use with caution! Shipped with spill mitigation granules of vermiculite in the packaging.