10K White gold and diamond necklace from Kay precious jewelry. I used this perhaps a total of 5 times, was $349, asking $100 OBO.
Right here is a listing for the very same locket on eBay /itm/New-429-Kay-Jewelers-10k-Solid-White-Gold-1-4-ctw-Diamond-Journey-Necklace-/?pt=US_Fine_Necklaces_Pendants&hash=item259346e11f.