24K vs 22K vs 18K Gold: Which Purity Should You Buy?

The three purities you'll see quoted everywhere — 24K, 22K, 18K — aren't tiers of "better" and "worse" gold. They're different trade-offs between purity and durability, and the right one depends on what the gold is for.

The core trade-off: purity vs strength

Pure gold (24K, 99.9%) is soft — soft enough that fine jewellery made from it dents, scratches, and loses shape with normal wear. Alloying it with metals like copper, silver, or zinc makes it harder and more durable, at the cost of purity. That's the entire reason 22K and 18K exist: they trade a bit of gold content for a piece that actually survives being worn.

24K — pure gold, for holding value, not wearing

24K is what you want when the goal is the gold itself, not a wearable object: coins, bars, and other investment-grade gold. It's rarely used for jewellery you'll actually wear day to day, precisely because of the softness problem above. If your goal is "I want to own gold as an asset," 24K (or paper equivalents like digital gold, ETFs, or SGBs) is the more direct route than jewellery.

22K — the traditional jewellery standard

22K (91.6% pure) is the default purity for most traditional Indian gold jewellery — bangles, chains, temple jewellery, wedding sets. It's durable enough for daily or frequent wear while still keeping gold content high, which also matters culturally and for resale, since 22K jewellery is the most liquid to exchange or sell back.

18K — built for stones and intricate work

18K (75% pure) is harder still, which is exactly why it's the standard for diamond and gemstone-studded jewellery — the setting needs to hold stones securely under everyday stress, and the higher alloy content gives it that strength. It's also lighter on gold content for the same weight, which is part of why 18K studded jewellery can be more affordable than an equivalent 22K piece, stone value aside.

A simple way to decide

• Buying gold purely as an investment/store of value → 24K coins/bars, or a non-jewellery instrument entirely.
• Buying traditional jewellery for regular or occasional wear → 22K.
• Buying stone-set or intricate design-forward jewellery → 18K.

Whichever purity you land on, the purity factor is what converts the live gold rate into your item's actual gold value — see the jewellery calculator to check the exact per-gram value at each purity before you decide.