细节
A BELLE EPOQUE RUBY AND DIAMOND BROOCH, BY KOCH
Set with a cushion-shaped ruby weighing 7.24 carats in a single and old mine-cut diamond cluster surround, circa 1910
Signed by Koch (indistinct)
With certificate 9606146 dated 4/7/1996 from the Gübelin Gemmological Laboratory stating that the ruby is of Burmese origin and shows no evidence of thermal treatment
Set with a cushion-shaped ruby weighing 7.24 carats in a single and old mine-cut diamond cluster surround, circa 1910
Signed by Koch (indistinct)
With certificate 9606146 dated 4/7/1996 from the Gübelin Gemmological Laboratory stating that the ruby is of Burmese origin and shows no evidence of thermal treatment