Antique, Edwardian Belle Epoque Ring. Platinum set with opal and diamonds. Origin of stones - see below. Ring circa 1900-1930. 

Ring US size 5.5. Weighs 3.9 grams. Opal approx 2.58cts. 18 diamonds approx 0.60ct and are G-H in color. 

Platinum shank. Shoulders with finely set diamonds lead to an oval ring of diamonds - approximately .72ct in all. Within,  is an oval opal - approx 3 carats in size. The opal is light coloured, but with fantastic coloured flares and vivid flashes in yellow, green, blue, orange and red with various shades of purple and gold inbetween. Lacy platinum openwork underneath testifies to the pride taken in making this ring and the quality of the workmanship. 

Imperceptible irregularity to the symmetry of the opal setting is shown in the 'photos and mentioned for the sake of total accuracy.
Hallmarked in the shank 10% irid plat - partly worn and illegible. 

Condition  is very good. A beautiful stone for the opal lover. 

The ring is accompanied by the original purchase receipt/assessment of the previous owner, who was an antiques dealer. It states that the opal is possibly from the "9 mile mine" near Coober Pedy, Australia. I had the ring independently appraised and the estimated value was $3500.-