Tanzanite Engagement Ring Tension Set Yellow GoldThis tanzanite engagement ring is an excellent fusion of classic and modern design. At its heart is a captivating 0. 5 carat oval cut tanzanite gemstone with a rich violet blue color. This hue contrasts excellently against the warmth of the 18K yellow gold it is set in. The setting is the showstopper here, it gives the tanzanite a floating illusion, held by an invisible force between the two sides of the band. The ring has a smooth, minimalist design