platinum ring with ruby and diamonds

An 18 carat platinum cluster ring set with a cushion-triangle, mixed facetted cut natural Burma ruby (app. 0.84 carat, with NEL report), surrounded by two rows of small rose cut diamonds (app. 0.50 carat in total), circa 1915.

weight: 2.77 grams
size: 16.5 mm / 6 US
width: 12 – 1 mm
ruby: 5.0 x 5.7 x 3.3 mm