22K (916) vs 18K (750) gold compared — purity, durability, colour, price, resale value and which karat suits bridal, daily wear and stone-set jewellery.
Same metal, different recipe. The karat you choose changes how a piece wears, what it costs, and what it is worth later.
Karat measures gold content out of 24 parts. 22K gold is 91.6% pure — stamped 916 under BIS hallmarking — with the balance in copper and silver for strength. 18K gold is 75% pure, stamped 750, with a larger alloy share that makes it noticeably harder. Anything below these, such as 14K (585), trades away more gold content for durability and price.
Because value tracks net gold weight, a 20 g 22K piece holds about 18.3 g of pure gold while a 20 g 18K piece holds 15 g. That gap is exactly why traditional South Indian buying — bridal sets, harams, kasu malas, mangalsutras — is done in 22K: the jewellery doubles as a store of family wealth. 18K buys design flexibility and durability at a lower ticket, not maximum gold content.
Pure gold is soft; alloys harden it. 18K's higher alloy content makes it markedly more resistant to scratches, bending and prong wear — which is why rings, thin chains, office-wear bangles and anything you never take off are safer in 18K. 22K pieces are tougher than their purity suggests but will show wear faster on thin, high-contact designs.
22K has the deep, warm yellow that South Indian traditional jewellery is known for, and it takes antique and nakshi finishes beautifully. 18K's colour is slightly paler in yellow, and its alloy freedom makes rose and white gold possible — plus rhodium plating for two-tone effects. If you want the classic heirloom look, 22K; if you want colour options, 18K.
Diamonds and coloured stones belong in 18K. The harder alloy grips prongs and pavé securely, and white 18K lets diamonds read brighter. 22K's softness makes it a poor host for small claw-set stones, though traditional kemp, uncut and cabochon work in bezel settings has been done in 22K for centuries — temple jewellery is the proof.
At the same weight, an 18K piece costs less simply because it contains less gold. Making charges, however, depend on craftsmanship, not karat — an intricate 18K diamond piece can carry higher making than a plain 22K chain. Compare invoices on net gold weight, purity, and itemised making rather than on sticker price.
Both karats are exchanged at the prevailing rate for their net gold content, provided the purity is certified — a BIS hallmark with a HUID makes valuation instant. Because 22K carries more gold per gram, it retains more absolute value. The point is not that 18K resells badly; it is that you should buy 18K for wear and design, and 22K when wealth preservation matters.
Choose 22K (916) for bridal sets, temple jewellery, kasu malas, mangalsutras and any piece bought partly as family wealth. Choose 18K (750) for diamond and stone-set designs, daily-wear rings and chains, office wear, and anything in rose or white gold. Many households hold both — 22K for occasions, 18K for every day. Ambaa Gold manufactures both, each BIS hallmarked.
18K (750) is better for daily wear — its higher alloy content makes it harder and more scratch- and bend-resistant, which suits rings, thin chains and office-wear pieces you never remove.
22K (916). It carries the deep yellow tone traditional designs need, holds more gold value per gram, and is the standard for harams, kasu malas, temple jewellery and mangalsutras.
It is not recommended. 22K is too soft to hold small prong-set stones securely; diamonds and pavé work are set in 18K, which grips stones firmly and offers white gold for brighter settings.
Yes. Hallmarked 18K is exchanged at the prevailing rate for its net gold content (75% of weight). It resells for less than 22K per gram simply because it contains less gold.
They are BIS hallmark purity marks: 916 certifies 22K gold (91.6% pure) and 750 certifies 18K gold (75% pure). Both appear alongside the BIS logo and a six-character HUID.