5.51 Emerald Cut Yellow Sapphire Engagement Ring 18kThis three stone engagement ring centers on a 5. 51 carat emerald cut yellow sapphire flanked by two trapezoid diamonds totaling . 90 carats. The emerald cut sapphire showcases its vivid yellow color through long, rectangular facets that create a hall of mirrors effect rather than the dispersed sparkle of brilliant cuts. Trapezoid diamonds provide geometric contrast to the center stone's rectangular outline, their angular shape echoing Art Deco design