One electronically tested platinum ladies cast tanzanite & diamond ring. Condition is new, good workmanship. The featured tanzanite is set within a diamond bezel, supported by an elaborate lattice under gallery and diamond set shoulders, completed by a two millimeter wide band. Bright polish finish. Trademark is Orianne. Identified with markings of "PT950" Containing: One prong set oval mixed cut natural tanzanite, measuring 11.98 x 9.42 x 5.40mm, approximate weight of 4.63ct., clarity is eye clean, type I, medium dark, very slightly grayish, violetish blue color, (GIA vB 6/3), 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. 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. Forty-four prong & channel set baguette & round brilliant cut diamonds approximate total weight of 44 Stones = 0.54ctw. The clarity & color grade reflect the overall average for the group. Graded in the setting. Clarity VS1 to SI1 Color G - H Total Weight of Colored Stones 4.63ct. Total Weight of Diamonds 0.54ctw. Total Weight of Ring 12.20 gm 4.63ct Tanzanite and 0.54ctw Diamond Platinum Ring Orianne Platinum Tanzanite, Diamond 13880