Art Deco 3.90ct Columbian Emerald & 4.15ct Diamond Necklace in Platinum

Art Deco diamond necklace, with detachable emerald pendant, crafted in platinum, featuring cut-cornered square-shaped emerald, accented with 3 old European-cut diamonds total weight approx. 0.65ct., old European, transitional and single-cut diamonds. Necklace is secured with a box clasp. Length 15.25 inches Emerald weight approx. 3.90ct. Color: deep vivid green Clarity: typical inclusions throughout, minor surface-reaching inclusions, spread shape, shallow pavilion, lively. Origin: Columbia Diamonds total weight approx. 4.15ct. Color range from H to I Clarity range from VS to SI Weight 23 grams Circa 1920 Ref# 510-000-878