One electronically tested platinum ladies cast tanzanite & diamond ring. Condition is new, good workmanship. The featured tanzanite is set within an inner and an outer diamond bezel, supported by diamond set shoulders, completed by a two and one-half millimeter wide band. Bright polish finish with milgrain detailing throughout. Trademark is Orianne. Identified with markings of "PT950" Containing: One prong set oval mixed cut natural tanzanite, measuring 11.50 x 8.80 x 5.00mm, approximate weight of 3.63ct., 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. 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. Seventy-four prong set baguette & round brilliant cut diamonds approximate total weight of 74 Stones = 0.92ctw. The clarity & color grade reflect the overall average for the group. Graded in the setting. Clarity VS1 to VS2 Color G - H Total Weight of Colored Stones 3.63ct. Total Weight of Diamonds 0.92ctw. Total Weight of Ring 11.50 gm Orianne |Platinum| Tanzanite RN027963