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Your cart is empty.This stone is ideal for use with test acids and testing solutions to determine karat of gold. It is made of natural stone, is easy to work with and convenient for your workspace, or those on-the-go. This stone measures 2" x 4" x 1/4".
william driscoll
2025-07-26 18:41:08
part of my testing kit that has earned its cost 4 or 5 times over already show what I thought was real to be fake and what I thought was fake turned out to be real to the tune of about 200.00 in earned or saved money
melindak
2025-07-24 18:01:20
Works great! Came as described. I really like the rubber like material on the bottom of the stone to keep it from moving.
Jeannie Marie Pederson
2025-07-12 15:34:14
Not as good as the other test stone I have, but I chose this because I needed a backup for testing batches of silver and wanted a bigger stone. The size and thickness is great! However, after using multiple times, the surface became very grainy. Also, a little pricy for one stone.
J. Walstrom
2025-05-13 10:05:05
I received the Touchstone ordered, very quickly. Yes, it has a rubber/plastic back surface to help hold it on a table or desk surface. However, it fails to show any effects of rubbing with a variety of gold items and gold jewelry (Au). The only item providing evidence of rubbing was a US Mint PENNY..and it doesn't even have any copper (Cu) in it anymore. I am very disappointed.
chihung ho
2025-04-12 14:49:52
incluning this one I had four stones, but this test stone work the best. I am a gold buyer.my shop is call molten gold.
lofty
2025-03-05 13:01:40
It is so easy to use and real results. It is amazing to see how gold karats differentiates. Job well done.
Craig Harrison
2025-02-04 10:37:24
very fine stone
Ann Hamner
2024-12-01 12:47:42
Very satisfied with this item. Love the larger size stone!
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