Large ring set with 4 diamonds: Half-cut diamond... Lot 19

Large ring set with 4 diamonds: Half-cut diamond of about 3.30 carats, presumed colour, presumed purity VS, no fluorescence found. Old cut diamond of about 2 carats, presumed colour I-J, presumed purity P2, no fluorescence found. In shoulder two old-cut diamonds of about 0.65 and 0.75 carats (lack of materials on the rondistes), presumed colour H, purity SI3, fluorescence zero for one and light for the other. The frame is made of platinum set with claws. Gross weight: 8.57 g. TDD: 51 (with half ring inside)