Edwardian Platinum Cushion-Cut No Heat Sapphire Filigree Ring with Diamonds

An antique Edwardian no heat cushion-cut sapphire ring in a delicate filigree mounting with small collet-set diamonds, in platinum. Circa 1915.

Antique Collection
1 antique cushion-cut sapphire: 3.78 total carat weight
AGL: No Heat, Australia Origin
20 old single-cut diamonds: 0.30 total carat weight
G-H color, VS1-VS2 clarity
Size 6.00 – alterable