3.66 Square Emerald Cut Tourmaline Diamond Ring in 14k Yellow Gold. This gorgeous, modern ring features a 3.66 carat emerald cut green tourmaline and .14 carats of diamonds in 14k yellow gold. The tourmaline has a deep emerald/forest green hue. The center stone is set in four (4) prongs and flanked by two (2) .07 carat accent diamonds. From the profile, a classic basket mounting holds the collection of stones. Finished on a polished 14 karat yellow gold band, this ring is love at first sight. For an innovative engagement ring that is truly unique, this green tourmaline and diamond ring is an excellent choice for any loved one.