Handcrafted Brilliant Tanzanite and Diamond Halo Ring in 14k Yellow Gold, December Birthstone, Tanzanite Engagement Ring, Gemstone Ring Absolutely brilliant blue-violet, this tanzanite is the perfect color, saturation and cut! The natural stone measures just over 8mm in diameter, totaling 2.18ct. Held with four prongs, the tanzanite is surrounded by a halo of diamonds which continues onto the top of the shank. There is even a peekaboo diamond under the gallery on the front and back! The…