One electronically tested platinum ladies cast & assembled tanzanite & diamond ring. Condition is new, good workmanship. The ring features a tanzanite set within a diamond bezel, supported by an elaborate lattice under gallery and mirroring diamond set shoulders, completed by a two and one half millimeter wide band. Bright polish finish with milgrain detailing. Trademark is Orianne. Identified with markings of "PT950". Containing: One prong set pear modified brilliant cut natural tanzanite, measuring 13.04 x 9.83 x 7.22mm, exact weight 5.51ct., clarity is eye clean, type I, medium dark, strong, violetish blue color, (GIA vB 6/5), cut is good. Transmitting light with no distortion, transparent. GIA Gemological Report attached. Graded loose prior to setting in the GIA Laboratory, Report #5172870366. 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. Thirty-seven prong set round brilliant cut diamonds exact total weight 37 Stones = 0.73ctw. The clarity grade reflects the entire range for this group. Graded in the setting. Clarity VS2 to I1 Color F - H Total Weight of Colored Stones 5.51ct. Total Weight of Diamonds 0.73ctw. Total Weight of Ring 11.40 gm SET IN PLATINUM TANZANITE FROM "D BLOCK" MINING AREA