4.45ct gem bluish purple tanzanite 18kw ring

This 4.45ct top gem blue purple tanzanite is uniquely cut into a square princess, set in 18k white gold.  I personally been to Tanzania countless time for buying tanzanite rough.  Please see Gems & Gemology Summer 1996 Gem News article with me in the famous "D Block" mining area, showing pictures at 1000' depth!