Vintage Canadian Platinum Solitaire Diamond Ring | 0.55ct SI1/SI2 H/I | SZ 6.25 | new356 00ct Synthetic Emerald

00ct Synthetic Emerald

20mm Gemstone Square Cut Blue Sapphires

09 ctw Accents Clarity I1/I2 Colour  J/K

Yellow Gold Size 4 1/2 Width 2

Metal 18k Yellow Gold Size 9 3/4 Width Top- 15

Vintage Canadian Platinum Solitaire Diamond Ring | 0.55ct SI1/SI2 H/I | SZ 6.25 | new356 00ct Synthetic EmeraldMetal Platinum Size 6 1 4 Width Front: 5. 30mm, Back: 2. 00mm Gemstone Round Brilliant Cut Diamond Carat 0. 55ct Clarity SI1 SI2 Colour H I Cut Good Fluorescence Yes Based on the platinum alloy used in this piece and the diamond cut, it is most likely from the late 1950 or 1960s. The manufacturer of the piece is Corona, a Canadian manufacturer based out of Montreal.