Jewelry Marks: How to Read Hallmarks, Stamps & Purity Codes

When you shop for jewellery, a tiny stamp can tell you a lot about what you’re holding. Those marks are the jeweller’s way of saying “this is genuine” and “this is the purity you’re paying for”. Knowing how to read them saves money and avoids disappointment.

Common Gold Marks You’ll See

Gold jewellery in India usually carries a four‑digit number that shows its purity. 375 means 9‑carat gold (37.5% pure), 585 is 14‑carat (58.5% pure), 750 is 18‑carat (75% pure) and the popular 875 is 21‑carat gold (87.5% pure). If you spot a “21K” or “21 K” marking, it means the same as 875. The BIS hallmark – a triangle with a line inside – often appears next to these numbers and guarantees the gold meets Indian standards.

Sometimes you’ll see “916” or “22K”. Those are 22‑carat pieces, mostly used for wedding rings and traditional designs. The higher the number, the richer the colour but also the softer the metal, so think about how you’ll wear it.

Silver Marks and What They Mean

Silver is a bit easier. The most common stamp is “925”, which means 92.5% pure silver, also called sterling. In India you’ll also find “800” (80% pure) and “833” (83.3% pure). The “833” mark is popular for traditional jewellery because it’s a little harder than pure silver, making delicate work easier.

Just like gold, a BIS hallmark can sit next to the silver stamp. If you see a “925” without any other clues, it’s usually safe, but always check for the Hallmark logo to be sure.

Other metals like copper or brass might carry a “Cu” or “Br” mark, especially on costume pieces. Those aren’t valuable in the same way as gold or silver, but they’re useful to know if you’re looking for something hypoallergenic.

Quick tip: use a magnet. Real gold and silver aren’t magnetic, so if the piece sticks, it’s likely plated or alloyed with a magnetic metal.

Beyond the numbers, you might also see maker’s marks – a tiny symbol or initials that identify the jeweller. These can help you trace the piece back to a reputable brand, which is handy for resale.

When you’re buying online, ask the seller for clear photos of the marks. If the marks are worn off, request a certificate or a return policy that covers authenticity.

Understanding jewellery marks isn’t rocket science, but it adds confidence to every purchase. Look for the purity number, check the BIS hallmark, and verify with a magnet test. With those simple steps, you’ll know if you’re holding genuine gold, sterling silver or just a shiny imitation.