ART DECO SAPPHIRE AND DIAMOND RING, J. E. CALDWELL & CO. Cushion-cut sapphire of 13.03 carats, single, baguette and half moon-shaped diamonds, platinum, circa 1925, ring size 5 ¼, signed J.E.C. & Co., no. N4222 AGL, 2019, report no. 1101905: Madagascar, no gemological evidence of heat or clarity enhancement Gübelin, 2019, report no. 19072107: 13.03 carats, origin not determinable, no indications of heating, with Information Sheet
ART DECO SAPPHIRE AND DIAMOND RING, J. E. CALDWELL & CO. Cushion-cut sapphire of 13.03 carats, single, baguette and half moon-shaped diamonds, platinum, circa 1925, ring size 5 ¼, signed J.E.C. & Co., no. N4222 AGL, 2019, report no. 1101905: Madagascar, no gemological evidence of heat or clarity enhancement Gübelin, 2019, report no. 19072107: 13.03 carats, origin not determinable, no indications of heating, with Information Sheet
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