A beautiful vintage 18ct gold ring with a round brilliant cut diamond star set into a platinum heart and lovely details on the shoulders.
Circa 1930s-1950s.
Stamped 18ct, a maker’s mark M.B.Co and a previous stock number on the inside of the shank.
It’s in very good vintage condition. The diamond shows some natural inclusions under magnification including a white feather at 7 o’clock. There is one teeny bite to the table, very hard to see but noted for complete accuracy. A good solid shank with very minor age-related surface wear. 
Size: Just under an L (UK) / 5.5 - 5.75 (US)
Weight: 1.8g approx 
Diamond weight: 0.10ct approx (estimated in setting)
Heart: 5.4mm x 5.7mm approx 
Shank width at back: Just under 2mm approx 
Heart profile: 4.4mm approx