The marking "d299" on a ring typically indicates that the piece is made of 299 parts per 1000 of pure gold, which translates to a gold purity of 29.9%. This suggests that the ring is likely a type of gold alloy, possibly 24K gold or a specific blend. Additionally, the "d" may refer to a design or manufacturer's code, providing further identification of the ring's origin.
925 on a ring mean
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