14k white gold price per gram

14k white gold is 58.3% gold, the same as 14k yellow. The remaining 41.7% is where they differ: white gold uses palladium, nickel, silver or zinc instead of the copper that makes yellow gold warm. Melt value depends only on the gold fraction, so the two are worth the same per gram.

Most white gold is also rhodium plated to get the bright cool finish people expect. Rhodium is more expensive than gold by weight, but the plating is microns thick and worth nothing at resale.

When rhodium plating wears through, the slightly warm alloy underneath shows and the ring looks dull or faintly yellow. This is normal wear, not a sign of fake gold, and replating costs very little at a jeweller.

If you are selling, do not bother replating. It adds nothing to the melt value.

A small caveat to the identical value rule. Nickel based white gold alloys carry no meaningful extra value, but palladium based ones contain a genuinely valuable platinum group metal. A refiner assaying a large lot may pay a little above the gold only figure. For a single ring, nobody will make the distinction.