One electronically tested 18KT white gold ladies cast tanzanite and diamond ring with a bright polish finish. The featured tanzanite is set within a tiered diamond set heart shaped bezel supported by diamond set shoulders, completed by a two and one-half millimeter wide band. Trademark is Hana. Identified with markings of "18K". Condition is new, good workmanship. Containing: One prong set pear mixed cut natural tanzanite, measuring 8.00 x 8.05 x 6.25mm, 6%. bulge factor, approximate weight of 2.86ct., clarity is eye clean, type I, dark, very slightly grayish, violetish blue color, (GIA vB 7/3), cut is good. Transmitting light with no distortion, transparent. Graded in the setting. Tanzanite is a very rare gemstone that is only found in the country of Tanzania. Originally discovered in 1967. Tiffany & Company, named the stone Tanzanite. It is found in the Usumburu Mountains that border the Umba Valley of northern Tanzania. Tanzanite occurs in gray, brown, violet, blue, reddish-purple, & green. The gem is interesting because of its exceptional pleochroism. Rotated in different directions a tanzanite will exhibit multiple changes of color. Tanzanite has a low tolerance to ultrasonic cleaning, and should not be cleaned using this method. Fifty-Six prong set round brilliant cut diamonds approximate total weight of 56 Stones = 0.86ct. Graded in the setting. Clarity: I-1 to I-2. Color: G - I. Total Weight of Colored Stones 2.86ct. Total Weight of Diamonds 0.86ct. Total Weight of Ring 5.61gm. AIG Appraised at $8,890.00.