Vintage 14k Gold 0.53ct Marquise Cut Diamond Engagement Promise Wedding Commitment Ring Set

One lady's 14k yellow and white gold, diamond solitaire ring and one 14k yellow gold, matching wedding band set. Set with: 

one marquise cut diamond, measuring approx. 7.00-4.07x3.00mm.,  weighing approx., 0.53ct., by gauge of I-1 clarity, F color, medium to good cut.

Set weighs 5.9
Ring size 5.5  (Sizing is possible)
Stamped 14k