Vintage French Alexandrite Diamond Engagement Ring

A Gorgeous Art Deco era vintage engagement ring is crafted in platinum and 18K yellow gold. The ring features an excellent 0.85 ct oval Alexandrite which changes its color from bluish green to pinkish purple when seen under different light. The center stone is encircled by old European and transitional cut diamonds followed by smaller old single cut diamonds. Estimated total diamond weight is 1.70 ct. The ring is marked with dog’s head French assay mark for platinum and maker’s mark. The Alexandrite and diamond cluster measures 19 x 17 mm (2/3 x 11/16 in.) Ring size 7.5 (18 mm) sizable. Circa 1930