White gold and yellow gold can have the same gold purity
The colour of gold jewellery does not by itself tell you how much gold it contains. An 18K white-gold ring and an 18K yellow-gold ring can both contain 75% gold. The difference is mainly the alloy recipe and surface finish, not a different definition of 18K.
GIA explains that pure gold is alloyed with other metals for jewellery. Yellow gold commonly uses alloys such as copper, silver and zinc, while white gold uses white-coloured alloying metals such as nickel or palladium and is often rhodium plated to produce a brighter white surface.
Purity still comes first in India
BIS permits several hallmarking grades for gold jewellery, including 18K/750 and 22K/916. The purity mark is therefore the first number to compare.
If two items are both 18K/750 and have the same net gold weight, their underlying gold content is the same even if one is white and the other yellow. The final retail price can still differ because of design, alloying, plating, stones and making charges.
| Feature | White gold | Yellow gold |
|---|---|---|
| Base precious metal | Gold alloy | Gold alloy |
| Colour | Produced with white alloying metals; often rhodium plated | Natural gold colour modified by alloying |
| Common purity examples | 18K/750, 14K/585 | 22K/916, 18K/750, 14K/585 |
| Maintenance issue | Rhodium plating can wear and may need renewal | No rhodium replating for colour |
| Price comparison | Compare same purity and net gold weight | Compare same purity and net gold weight |
Why white gold may cost differently
A shop can charge differently for two pieces with the same gold weight because jewellery pricing includes more than the metal. White gold may involve a particular alloy, rhodium plating, stone setting or a design with higher workmanship cost.
That does not mean “white gold is more pure.” Purity is stated by karat/fineness. A higher retail price can come from manufacturing and design rather than extra gold content.
Maintenance matters
GIA notes that white gold is commonly rhodium plated. Over time that surface can wear, allowing the underlying warmer tone to become more visible. Replating is a maintenance service, so buyers should ask a jeweller whether future replating is expected and what it may cost.
Yellow gold does not need rhodium plating to preserve its colour, although any gold jewellery can still scratch, bend or need polishing depending on purity and use.
What about resale?
Do not assume that the colour alone decides resale value. A resale or exchange assessment can consider verified purity, net gold weight, current metal value, stones, condition and the retailer's buyback policy. The original design or plating premium may not be recovered in full.
For an Indian buyer, the practical checks are:
- verify the BIS hallmark/HUID where applicable;
- confirm karat and fineness;
- ask for net gold weight separate from stones;
- compare the same purity when checking metal value;
- ask whether rhodium replating is included or chargeable;
- read the retailer's exchange/buyback terms.
22K white gold needs careful wording
White-gold jewellery is frequently encountered at lower karats such as 18K because higher alloy content makes it easier to create a whiter appearance and a durable setting. If a seller advertises a high-karat white-gold item, rely on the actual purity mark and hallmark rather than colour or marketing language.
FAQ
Is white gold real gold?
Yes. White gold is gold alloyed with other metals to alter its colour and properties. Its gold content depends on the karat/fineness, such as 18K/750.
Is 18K white gold worth less than 18K yellow gold?
Not necessarily. If purity and net gold weight are the same, the underlying gold content is the same. Retail price can differ because of design, alloy, plating, stones and making charges.
Does white gold stay white forever?
Not always. White gold is commonly rhodium plated, and GIA notes that the plating can wear over time and may need renewal.
