Antique diamond & ruby three-stone gypsy ring

Antique old-cut diamond and cabochon burmese ruby three-stone gypsy ring, mounted in 18ct yellow gold. The words 'R.b.g from her grandmother f.b june 26/1878' engraved in script on the inside.

Ring size L
Diamond weighing approx. 0.50ct
Rubies weighing approx. 0.50ct in total