Art Deco Onyx & Diamond Ring

An Art Deco platinum ring with an elongated oval top mount set to the centre with an old cut diamond of estimated weight 1.01ct graded as colour I and clarity VS2 above an oval polished onyx plaque secured within a millgrain rimmed setting which is surrounded by a border of twenty small old cut diamonds on a pierced gallery to flared upswept diamond set shoulders with pierced detail on a double ridged tapering band.
Total Estimated Diamond Weight: 2.33ct
Weight: 5.2grams

Age: C1920