Princess-Cut Quad Diamond Engagement Ring with Missing Stone

This is a white metal engagement ring, likely crafted from 10k or 14k white gold or platinum, featuring a prominent 'quad' center setting. The center head is a square shape held by four rounded prongs at the corners. It was originally designed to hold four princess-cut diamonds invisible-set together to simulate the look of a larger single stone. However, one of the four center princess-cut diamonds is missing, leaving a dark, empty void in the bottom-right quadrant of the main face. This is a significant condition issue that greatly impacts the aesthetic and structural integrity of the piece. The shoulders of the ring are wide and taper slightly toward the shank, featuring channel-set princess-cut diamonds extending down each side. The metal shows signs of surface wear and light scratches consistent with regular use. The overall style is contemporary, popular in the late 1990s through the 2010s. The invisible setting technique used for the center stones is intricate but known for being fragile; if one stone falls out, the remaining stones are often loosened. This ring requires professional repair and a replacement stone to be restored to its original state.