Canada White gold is not a different metal — it is yellow gold mixed with white metals such as palladium or nickel to bleach the colour. A 14K white gold ring and a 14K yellow gold ring contain exactly the same amount of pure gold: 58.3%.
That means their melt value is identical. When a Canadian gold buyer values a white gold chain or ring, they weigh it and pay for the gold content by karat, exactly as they would for yellow gold. Use the same melt value calculator for both.
Most white gold jewellery is plated with rhodium, a bright white platinum-group metal, to improve the colour. The plating is microscopically thin and adds no meaningful value; it wears off over years and can be re-applied by a jeweller.
Where white gold can cost more is at retail: palladium-alloy white gold and rhodium plating add manufacturing cost, so new white gold jewellery sometimes carries a slightly higher price tag. That premium disappears at resale — buyers pay for gold content only.
One practical note: nickel-alloy white gold can irritate sensitive skin. If you are buying rather than selling, palladium-alloy or rhodium-plated pieces are the safer choice.