Ruby and diamond cluster ring

Collet set with a circular facetted Burma ruby, approximately 1.40ct, to an oval border set with two rows of graduating diamonds, cut-down set edge to border, split shoulders and shank, mounted in gold and platinum, inscribed serial number 144, French assaymark to shank and inscribed serial number 144, accompanied by GCS report no. 78144-15 giving the Burma origin opinion for the ruby and it shows no evidence of heat treatment
Length of cluster 1.4cm / 9/16''

Ruby approximately 6.5 x 6.5 x 4.4mm
Weight: 3.5g