Kwiat emerald cut diamond engagement ring with a wide split diamond band in platinum, from $5900, kwiat.com. SHOP A modern twist on the ever-popular halo, the light blue enamel of this ring offers ...

The large bauble features an emerald-cut stone with a sparkling halo set in a diamond pavé band, and it is absolutely beautiful. "And then there were three...and a ring," Hannah captioned the photo.