Art Nouveau Three Stone Diamond Ring, circa 1900

This very pretty Art Nouveau ring is set with three old cut diamonds. They are mill grain set in platinum and sit within a platinum topped oval halo. The top of the shoulders are tipped with platinum leading to a knife edge yellow gold shank.
The shank is 18ct gold.
Excellent condition.

Dated: c1900
Stamped: 18CT&PLAT
Diamond weight: .15ct approx.
Weight: 2.1 grams
Ring size: O