I wonder if anyone can explain a strange occurrence. My wife
recently bought what appeared to be a very worn sapphire in an 18ct
white gold ring for a very advantageous price. I recut the sapphire,
which turned out spectacularly well (it was native cut and the vendor
hadn’t realized its quality). While the stone was out, I submitted
the ring for hallmarking. It was stamped 18K although I expected it
would probably assay at 14K, as it was not a UK piece. I was very
surprised when the assay office called me to say that it was pure
palladium. The SG of the mount confirmed this (about 11.5; I didn’t
take the accent diamonds out) This is more costly than 18K and I
can’t think why anyone should try to pass it off as such.
Can anybody cast any light on this?