The intrinsic value of a 14kt two-tone piece is calculated on total gold weight at 14-karat purity: same as any other 14kt piece of equivalent weight.
Industry Insight
Two-tone gold means exactly two colors, typically yellow and white, while multitone extends to three or more, most commonly adding rose gold as the third element in the palette.
Elemental Detail
The color difference between zones in a 14kt multitone piece comes from the alloy metals added to the gold, not from any variation in gold content. Each zone maintains 58.3% pure gold by weight, the same standard across the entire piece.