Antique 10K (acid test) White Gold Filigree Necklace with Diamond Pendant Necklace. Antique 10K white gold and diamond pendant necklace. The 14K white gold chain from which the pendant hangs is not original and has been replaced. Approximate measurements are pendant 2 inches long by 3/4 inches wide, chain 17 1/2 inches long. The pendant features filigree detailing on the front and a smooth back. It is not marked but tests 10K gold. The chain is 14K white gold. Both are in good condition and ready to wear and add to your collection.