Open-arched filigree and milgrain trim highlight the 18k white gold band of this vintage style blue sapphire engagement ring. Open-arched filigree and milgrain trim highlight the 18k white gold band of this vintage style blue sapphire engagement ring. A collection of twenty princess and round brilliant cut diamonds cascade down the shoulders and accentuate the shank. A round violet blue sapphire ascends from the center of this diamond shimmer. This is a (new) vintage style engagemenet ring.