An early 20th century pink sapphire and diamond ring

An early 20th century pink sapphire and diamond ring
The square-cut pink sapphire within a surround of four old brilliant-cut diamonds, to a plain hoop, finger size O½
Accompanied by report no. 09227, dated 14th January 2014, from The Gem & Pearl Laboratory stating that the pink sapphire showed no evidence of heat treatment, origin opinion: Burma