Does gold react with fruit juices?
Pure gold will not react to fruit juices. But 24ct gold is too
soft for ordinary wear, so a gold ring will be alloyed with other
metals to improve wear resistance. But it would be unusual for gold
jewellery to react with common materials, for this problem is quite
foreseeable.
BUT, mercury will amalgamate with gold, and the amalgam must be
physically be removed, probably by a jeweller.