7.70ct Tanzanite and 0.37ctw Diamond Platinum Pendant/Necklace (GIA CERTIFIED)
One electronically tested platinum ladies cast and assembled tanzanite and diamond pendant with chain. Condition is new, good workmanship. The pendant features a tanzanite set within a diamond bezel completed by a diamond set bail. The pendant is supported by an eighteen inch length platinum cable chain, terminating in a lobster claw clasp. Bright polish finish. Trademark is Orianne. Identified with markings of "PT950". Containing:
One prong set oval modified brilliant cut natural tanzanite, measuring 13.49 x 10.17 x 7.76mm, exact weight 7.70ct., clarity is eye clean, type I, medium dark, moderately strong, violetish blue color, (GIA vB 6/4), cut is good. Transmitting light with no distortion, transparent. GIA Gemological Report attached. Graded loose prior to setting in the GIA Laboratory, Report # 1172379259.
Tanzanite is a very rare gemstone that is only found in the country of Tanzania. Originally discovered in 1967. Tiffany and 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, and 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 prong set round brilliant cut diamonds approximate total weight of 30 Stones = 0.37ct. Graded in the setting.
Clarity SI-1 to SI-2
Color F - H
Total Weight of Colored Stones 7.70ct. Total Weight of Diamonds 0.37ct. Total Weight of Pendant With Chain 7.41 gm