How do you test for 925 sterling silver jewelry quality?
There are two commonly used tests to determine the silver content in an alloy. X-ray testing is non-destructive but requires special, expensive equipment. Jewelry must be sent to a lab for x-ray testing. This test is fairly accurate on most silver items. อย่างไรก็ตาม, it can be fooled by layered metals and some types of plating, so accuracy is less reliable. The best means of testing are wet chemical analysis or assay, which require a small amount of material to be permanently removed from the jewelry. These tests are extremely accurate when conducted in a reputable lab. We have a complete article dedicated to explaining jewelry lab tasting and the vigorous quality controls for sterling silver jewelry supplies at Halstead. Read about Halstead Lab Testing for Quality Control: A Jewelry Quality Assurance Program.
Neither of these lab tests is a viable option for consumers looking for a quick test at home. Instead, consumers are advised to buy silver from reputable sources that are honestly disclosing details on their materials. Quality stamps are also an excellent indicator when available.