Fantastic XXL Tanzanite 51.90 ct Untreated Deep Blue Simply a wonderful and unic Collector piece, just one in the world, no more ! Good Grade, see pictures +/- 24 x 19.2 x 14 mm You can easily verify that this kind of gem can reach a trade value over 2000 € Notes: - Shipment by Full value Insured & Registered Express Mail with tracking number, 1 to 10 days depending of destination country. - Note that photos are taken in macro magnification under light ( sun, incandescent, fluorescent, led ) to show the most details with maximum honesty. - Some imperfections ( like micro scratches) or details may not be visible to the naked eye, please carefully look at all pictures before placing a bid. - Where I have represented the colour of this gemstone as accurately as I can, monitors and screens show colours differently. Please bear this in mind when bidding. - Treatment declaration and country of origin are the gemological opinion of the seller and is not substantiated by an official laboratory. - Please note that Opals are Climateric Gemstones and their aparence can change. All Opal need light to show his fires.