SIlver Jewellery

How to Check Silver Purity

How To Check Silver Purity

Silver is a well-known metal found in jewelry, coins, and many other items. But not all the silver here is pure. It is high time to learn how to check silver purity. This article will reveal the ways of testing the silver purity.

Understanding Silver Purity

Silver’s purity is measured in parts per thousand. The symbol 999 denotes pure silver or 99.9% silver. The composition of sterling silver is 925, with 92.5% silver and 7.5% additional elements. Such stamps are typically carved into the silver product. This is the very first step in determining silver purity.


1. Visual Inspection:

The first thing to check the silver purity is visually inspecting the area of the silver items. Try to find a hallmark, a small imprint that informs you of the silver content. Typically, 999, 925, and 800 grades are stamped to mark the silver piece. If you come up with these marks, it probably means that the item is real silver.

Nevertheless, as fake items may also have fake stamps, it is proper to subject products to further testing. Also, keep an eye out for signs of tarnishing. Silver will eventually start tarnishing, which will reveal its surface with a black or dark gray patina. The absence of tarnish on an older object might indicate it’s not made of real silver.


2. Magnet Test:

Silver is not magnetic. How to check the silver purity is no more tough with a magnet test.

  • Take a strong magnet.
  • Bring the magnet close to the silver object.
  • If something gets attracted to a magnet, it is not pure silver.

This procedure’s testing pattern is generally fast and simple, but it is not infallible. While silver, on its own, being a non-magnetic metal, alloys, it bonds it with other metal-making detectors to give ambiguous results.

3. Ice Cube Test:

Silver is a highly thermally conductive metal. To know how to check silver purity, do an ice cube test:

  • Put the ice cube on the silver piece.
  • If the ice cube melts quickly, the object will probably be silver.
  • This test is simple, which makes it easy to combine with other types of tests to increase accuracy.
  • For an impact, test the ice cube on a non-silver item. The variance in a melt rate is sometimes quite evident.


4. Sound Test:

The sound test is another approach to check silver purity. A silver ring sounds around 6145 Hz. Many experienced numismatists can identify if an object they inspect is silver by simply giving it a “ping.” When pure silver items contain tungsten instead of copper, they produce a clear, high-pitched ring when they are tapped. Hang the item and tap it with another metal object. If it expresses a distinguishably bright sound, it will be silver. If it is dull-toned, then it might be made of a different material. The above test works well for the coins and flatware, but it will be less efficient for other items.


5. Acid Test:

The acid test is the most precise way to determine the silver purity. The silver testing kit, which includes hydrochloric acid, will be useful. Follow these steps.

  • Make a small cut in a part of the item that is impossible to see.
  • Add a drop of nitric acid to the scratch.
  • Observe the color change.
  • Only pure silver will have a creamy white luster.
  • If it turns green, it is composed of copper or another metal.

Remember to be careful when using acids. Wear gloves and work in a well-aired space. Certain test kits are equipped with different acids to check various levels of silver purity and deliver a more detailed analysis.

6. Density Test:

The molten silver has a specific gravity of 10.49 g/cm2 at a relative temperature. To do the density test, you must have a scale and some water in the container. Here are the steps:

  • Weigh the silver item.
  • Fill the container with water and mark the water level position.
  • Dip the silver item into the water and observe the water’s height.
  • The volume should be calculated by taking the difference between the initial water level and the final level.
  • Divide the item’s weight by its volume. This should yield a result that is close to 10.49 g/cmΒ³ for pure silver.

This test’s accuracy is very high, and the results depend on making the measurements exactly. Make sure that the item is fully submerged; otherwise, the measurement won’t be accurate

7. Professional Appraisal:

If you don’t have any idea about the test results, you should have the item appraised by an expert. The professionals at jewelry stores like Tweov have the tools and expertise to get the silver purity level correctly. This method is suitable for precious silver things. Highly qualified appraisals will have a certificate of authenticity, which is important for insurance and sales purposes.


Verification of silver purity is a concern shared by both buyers and sellers. Simple obviation tests, such as visual inspection, magnet tests, and ice cube tests, can be easily done at home. If you want the results to be more accurate, then conduct sound tests, acid tests, density tests, or XRF analysis. When you are in doubt, always consult an expert. The above steps are the best way to guarantee the genuineness and purity of your silver items.


1. What does the "925" symbol on silver jewelry stand for?

The hallmark “925” denotes that the product is manufactured of sterling silver, which is composed of 7.5% additional metal and 92.5% pure silver. The same fineness applies to silverware, vases, and rings.

2. Do counterfeit silver items bear hallmarks?

In some cases, the counterfeit silver goods might even have hallmarks. Some sellers can mark their low-quality items with ‘925’ or ‘999’ to trick buyers. So, it is advisable to screen using other tests rather than hallmarks alone.

3. Is the acid test worth valuing all silver items?

The acid test is safe if done with a good approach. On the other hand, it is performed by scratching the object and putting nitric acid. These processes can result in the deterioration of fragile or old items. Do this evaluation with care and think about the professional appraisal compared to the valuable objects.