Vintage Canadian Platinum Solitaire Diamond Ring | 0.55ct SI1/SI2 H/I | SZ 6.25 | brooch Metal 14k Yellow Gold Size

Metal 14k Yellow Gold Size 6 3/4 Width Front: 4

Metal 14k Yellow Gold Length 15" Width 1

Round Brilliant Diamond Carat Centre: 1

00 ct Smoky Quartz

80mm Gemstone Rectangular Cut Synthetic Colour Change Sapphire Carat 6

Vintage Canadian Platinum Solitaire Diamond Ring | 0.55ct SI1/SI2 H/I | SZ 6.25 | brooch Metal 14k Yellow Gold SizeMetal 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.