| MadSci Network: Chemistry |
Unfortunately, there is not much that can be done. It is not possible to add material of exactly the same composition, because the whole ring would melt. The best that a jeweler can do is use a lower melting alloy to fill the gap he cut to enlarge the ring. Your friend's fiance should have gone back to the jeweler where he got the ring and had the stone set in a ring the right size.
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