14 KT Natural Diamond ring - $2,950 (napa county)

14 KT yellow gold mounting ring, the natural diamond is set in platinum.
Measurements: 5.
47-5.
5 x 3.
58 mm.
Shape cut: round brilliant.
Purchased new for almost $4,000 (see sales receipt from Kay Jewelers) I have sales receipt and proof of purchase from Kay Jewelers - see photos.
Condition is as NEW.