Antique Art Deco 0.85ct Three-Stone Diamond 18k White Gold Ring

Stunning antique "Art Deco" circa 1920, three-stone diamond ring in 18k white gold with a high gallery decorated with millegrain and openwork.  ID#: RG840 Diamonds: Three (3) prong set, transitional cut diamonds. The middle stone measures approximately 4.5mm  x 2.56mm, est. 0.32ct,and the two (2) flanking stones measure approximately 4.3mm x 2.46-2.76mm, est. 0.28-0.30ct ea.  The estimated colour is G/H and the estimated clarity is VVS2-VS1. The total estimated diamond weight is 0.90ct.  Metal: 18k white gold (acid tested)  Size: 6   Weight: 3.2g