Vintage Canadian Platinum Solitaire Diamond Ring | 0.55ct SI1/SI2 H/I | SZ 6.25 | brooch 80mm Gemstone Rectangular Cut Synthetic

80mm Gemstone Rectangular Cut Synthetic Colour Change Sapphire Carat 6

Metal 14k Yellow Gold Length 15" Width 1

01ct Clarity I2 Colour I/J Cut Fair

Round Brilliant Diamond Carat Centre: 1

00 ct Smoky Quartz

Vintage Canadian Platinum Solitaire Diamond Ring | 0.55ct SI1/SI2 H/I | SZ 6.25 | brooch 80mm Gemstone Rectangular Cut SyntheticMetal 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.