A HIGHLY IMPORTANT BURMESE SAPPHIRE AND DIAMOND RING

Details
A HIGHLY IMPORTANT BURMESE SAPPHIRE AND DIAMOND RING
Designed as a stylized blooming flower centering on an oval-cut Burmese sapphire weighing approximately 21.01 cts. within an oval-cut diamond petal surround, mounted in platinum--size 6
With certificate 9702041 from Gubelin Gemological Laboratory stating that the origin of the natural sapphire is Burma (Myanmar). No indications of thermal treatment.

With 8 certificates from the Gemological Institute of America stating that the diamonds are:

Certificate Weight Color Clarity
10520366 1.01 ct. E VS2
10520363 1.01 ct. E VS2
10520508 1.02 ct. F VS1
10520359 1.03 ct. D VS1
10520336 1.03 ct. G VVS2
8469039 1.08 ct. F VS1
10520332 1.08 ct. G VS1
10520334 1.09 ct. F VVS2