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Economical black glass stone used with solutions and test needles to determine karat values.
Measures: 2″ x 1-1/2″ x 3/16″
Wood case contains three acid bottles with ground glass stoppers and applicators, test stone, set of gold testing needles.
For slightly more than the cost of a test acid kit the ET-18 precisely determines gold karat values equal to or greater than 10K 14K and 18K. Pocket sized and battery operated.
The M-24 precisely determines gold karat values equal to or greater than 9K 10K 12K 14K 16K 18K 20K 22K and 24K.
Natural testing stones are used with solutions and test needles to determine karat values of precious metals.
Needles and item to be tested are rubbed on test stones and treated with acid to determine match.
Test solution acid for various metals. From 10K-22K gold, silver & platinum. 12 gram bottles.
Stone used with solutions and test needles to determine karat values.
Showing all 11 results