One electronically tested 18KT white gold ladies cast & assembled tanzanite and diamond pendant with chain. The pendant features a tanzanite set within a tiered diamond bezel supported by a diamond accented latice under gallery, completed by a diamond set bail. The pendant is supported by an eighteen inch length 14KT white gold designer style chain, terminating in a lobster claw clasp. Bright polish finish with milgrain detailing. Identified with markings of "18K". Condition is new, good workmanship. Containing: One prong set cushion modified brilliant cut natural tanzanite, measuring 16.43 x 12.72 x 8.67mm, exact weight 16.95ct., clarity is eye clean, type I, dark, moderately strong, violetish blue color, (GIA vB 7/4), cut is good. Transmitting light with no distortion, transparent. GIA Gemological Report attached. Graded loose prior to setting in the GIA Laboratory, Report #2151951660.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. Eighty-Six prong set round brilliant cut diamonds, measuring 1.50 - 1.40 x 0.87mm (depth est.) approximate total weight of 86 Stones = 1.05ct. Graded in the setting. Clarity: VS-2 to SI-1. Color: G - I Forty-Five prong set round brilliant cut diamonds, measuring 1.10 - 1.00 x 0.63mm (depth est.) approximate total weight of 45 Stones = 0.20ct. Graded in the setting. Clarity: VS-2 to SI-1. Color: G - I One prong set baguette cut diamond, measuring 3.40 x 2.00 x 1.40mm (depth est.) approximate weight of 0.08ct. Graded in the setting. Clarity: SI-1. Color: G. Total Weight of Colored Stones 16.95ct. Total Weight of Diamonds 1.33ct. Total Weight of Pendant With Chain 16.59 grams. AIG Appraised at $47,745.00.