ANOTHER OF MY CERTIFIED NATURAL UNTREATED TANZANITE'S SEALED INSIDE THE HKD CIRTIFICATE. THIS TOTALLY NATURAL MAGNIFICENT GEM HAS BEEN IN MY COLLECTION FOR AT LEAST 6-7 YEARS LONG BEFORE THE TANZANIAN GOVERNMENT'S TAKE OVER WHEN ALL GEMS WERE AND STILL ARE TREATED TO ACHIEVE A STANDARD BLUE. PERFECT FOR MOUNTING OR FOR ONE'S OWN COLLECTION AND IS IN MY HUMBLE OPINION A AAA STONE... This item is in the category "Jewellery & Watches\Loose Diamonds & Gemstones\Loose Gemstones". The seller is "raregemsbyash" and is located in this country: GB.