The jeweler had finished setting a princess cut stone in a platinum
mounting. He then was going to rodium plate the mounting. He was
using a different plating solution than he usually used. He used
the same procedures that he has used for years on rhodium plating a
mounting with a stone in it. After following his procedures to his
horror the diamond is now tinted a gun-metal blue. We know that
this is a coating, but URGENTLY need advise on how to remove it. We
called the manufacturer of the Rhodium plating solution who
suggested a chemical solution called hydroflouric acid. This
chemical can only be used in a high-grade laboratory setting.
Obviously this is not an option to us. All suggestions are welcome.