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.

14K Gold Double Love Knot Ring. Etsy. $162. ... This ring features a center opal surrounded by tiny diamonds on an 18K yellow gold vermeil band, ...

HyunA and Dawn's matching engagement rings feature opal stones and seven multicolored ... we're sure HyunA and Dawn's wedding-day outfits will be out-of-this-world cool when they tie the knot.

When Turner proposed to Fonda, he did so with a black opal and gold ring. ... Fonda tied the knot for a third time. When she said “I do,” to media mogul Ted Turner in 1991, ...