In fact, it became so valuable that it was known as whitegold and spies were sent to China to discover what they did to the clay to produce such high-quality merchandise.
This happens in an alloying process so gold is combined with palladium to create that 'whitegold' effect.
这在合金的过程中发生，就像黄金和钯合金达到“白金”效果一样。
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It is normal for whitegold jewellery to lose brightness over time, but whitegold wedding rings can be maintained with rhodium plating every few years or so.