The opal stone's unique beauty makes it a great choice for the unconventional bride, or the couple looking for a less traditional engagement ring. Here, 45 stunning opal engagement rings.

Opal jewelry is having a moment right now, ... Kimberly McDonald One of a Kind White Opal Marquis Ring with Signature Irregular Diamond Bezel set in 18K Yellow Gold, $7,700; kimberlymcdonald.com. 12.