YONG Practical Acid Test Kit Gold Testing Touchstone Jewelry Tool Set

Features:

This kit is used to verify the gold content in items!

Apply a drop of this solution to a small sample of the item to be tested onto the test stone.

then the real gold will stay on the touchstone, false one will be dissolved or oxidized to blue

If the sample disappears, then the item is below the karat of the solution

for Ideal for testing jewelry, gold