A ruby and diamond ring, early 20th century

A ruby and diamond ring, early 20th century, set with a vertical line of oval rubies, to an openwork mount set with rose-cut diamonds, mounted in gold and platinum, size O, stamped 18CT PLAT

Accompanied by The Gem & Pearl Laboratory report no.22406, Dated November 18th 2022, stating that the oval/rectangular/cushion-cut Rubies are of Burmese origin with no evidence of heat treatment.