Easily test the karat content of gold with ToolTreaux’s 10k Gold Testing Kit with Gold Testing Stone! The kit includes two, 0.5oz bottles and one gold testing stone. The included testing solutions are potent, effective and will see you through hundreds of tests! Housed in small, sturdy, shatterproof plastic squeeze bottles, the 10k gold testing solution bottles are easy to maneuver, giving the tester control over the amount of solution escaping the bottle. GOLD TESTING KIT METHOD: This gold testing method is best used on gold that is yet to be smelted, due to the harsh nature of the solution, that could potentially damage an already finished item; if testing fine jewelry or other finished gold items, be sure to choose an inconspicuous spot, so as not to compromise the finished piece. HOW THE GOLD TESTING KIT WORKS: To test gold karat content and purity, scratch the item onto the test stone leaving a visible deposit, then place a small drop of the solution over top of deposit; if the gold is the same karat or higher, the solution will not affect the deposit; if the deposit is of a lower karat, the deposit will dissolve and eventually disappear; ensure gold testing stone has been thoroughly washed before completing any testing! PLEASE NOTE: Testing Solutions can be harmful to the skin. Please exercise the utmost caution when opening and using this product and method of testing! Proper protective eye wear and gloves are highly recommended, as the solution can burn unprotected skin. Read the label on the bottle and follow provided operational instructions. WARNING: This product can expose you to chemicals including bisphenol_a_(bpa), which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to: www.P65Warnings.ca.gov