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The first step in testing gold is always the magnet test. If the item attracts to a magnet even just slightly it is not real gold, silver, palladium or platinum. These precious metals are non-ferrous meaning they are not magnetic. If your item is magnetic it means there is no reason to test it with acid.

20 Jul 2012
At that point you know that the test mark is equal or higher than the solution. MORE ACCURATE TEST: If you must determine more accurately the gold karat, you must use a combination of the acids and gold testing needles. File a deep scratch in the object to be tested and scratch a 1 inch line on the gold test stone.
How to test for gold, silver and platinum. The acid test. Advice on testing gold, silver and platinum from the leading manufacturer of precious metal testers. . A. I'm red-green colour-blind and I have included special instructions explaining what the "colour change" looks like to me, our acids do not require you to see the
The scratching and testing is repeated with the 18K solution and the 22K solution (if available) until the karat of the object is determined. For test solutions, see Precious Metal Test Acids. Remember that when the solution being used dissolves the scratch slowly and leaves rusty color particles it is probably two karats lower
Rub the jewelry on the test stone using 4 firm strokes (two forward and two back) so that a noticeable streak of metal is on the stone. Apply a drop of the pre-mixed acid to the center of the streak. If the metal streak noticeably changes color or disappears, then the metal is less than the karat of the test acid.
Next, put on protective gloves and place a drop of acid from the 18k gold testing bottle over the small notch. A highly effervescent green reaction indicates base metal, and no further testing is required. If there is little or no reaction, the piece is likely karat gold, and the next test is for purity.
12 Jun 2014 Learn how you can quickly and easily value your products or possessions: don't be fooled by the gold buyer at the counter, you need to know the real value BEFORE you decided to buy or sell! In the following instructions we will give you the basic knowledge to begin to practice using acid testing kits to
27 Aug 2013 How to test gold and silver jewelry using nitric acid. See the common reactions precious metals have with nitric acid.

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March 2018