C. 1990. Reminiscent of cool waters, this Estate collection pendant necklace shimmers with a 1.55 carat oval tanzanite, casting a unique blu… C. 1990. Reminiscent of cool waters, this Estate collection pendant necklace shimmers with a 1.55 carat oval tanzanite, casting a unique blue-purple hue beneath a trio of .20 ct. t.w. round brilliant-cut diamonds. The gems are held in an eye-catching geometric design of polished 14kt white gold, suspended from a snake chain. Lobster clasp, diamond and tanzanite pendant necklace. Exclusive, one-of-a-kind Estate Jewelry.