1.54 Oval Cut Tourmaline Engagement Ring in 14k White Gold.  This dazzling, modern engagement ring features a 1.54 carat oval cut tourmaline and .42 carats of accent diamonds set in 14k white gold. The center tourmaline has a highly saturated, dark green hue. The tourmaline is prong set and accented by forty-two (42) .01 carat diamonds on the shoulders of the band. From the profile, a sleek basket mounting with a diamond gallery rail supports the center stone.