Understanding the purity stamps on silver jewellery
The markings found on silver ornaments represent their purity levels measured in parts per thousand. A stamp of 999 signifies 99.9% purity, while 970 indicates a composition of 97% silver mixed with 3% other metals. Similarly, 925 represents sterling silver at 92.5% purity, 900 denotes coin silver at 90%, and 800 stands for 80% purity. Within the category of hallmarked silver, the 925 and 800 grades are the most frequently used, making up approximately 95% of all hallmarked items.
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