A stunning Art Deco Burmese star sapphire and diamond brooch by J.E. Caldwell and Co set in pierced openwork platinum. The oval star sapphire displays excellent asterism with a clearly visible six pointed star, and is encased in the most delicately finished panel of pierced openwork platinum. The platinum panel is set with a melody of different cut diamonds, including marquise, baguette, Old European and transitional round brilliant cut diamonds. Estimated Burmese star sapphire weight: 6.30cts. Estimated total diamond weight: 4.45cts. Assessed diamond colour: G. Assessed diamond clarity: VVS-VS.