Art Deco three stone Burma ruby and diamond ring

Collet set together, to a broad tapering platinum shank, with facetted shoulders each inset with a fan-shaped diamond, accompanied by AGL report no. 1097198 giving a Burma origin opinion on the rubies and that they show no evidence of heat treatment
The rubies approximately 6.0 x 5.9 x 3.92 to 5.2 x 3.5 x 2.50mm
Weight: 11g