The two main differences between platinum and white gold are the composition and price. White gold consists more of a mixture of durable metals like nickel, zinc and copper while platinum is more pure with 95-98% platinum composition. More platinum is needed to make a ring though, causing the price to be 40-50% more.While the key differences between these two precious metals are composition and price, they look nearly identical to the naked eye.For example, compare these two complete rings from James Allen’s inspiration gallery. Can you tell the difference between this white gold setting and this platinum ring? I just tested this with 20 people and not a single person could pick out which was more expensive.To help you learn more about the differences between platinum and white gold, we’ve outlined the main things you should know regarding cost, composition, color and care.