The gemmologist said:
This class of Tanzanite belongs to the very top 1% mined and is very rarely seen in the market. Out of a thousand carats mined literally 9 or 10 will be of this grade. These colours are extremely rare and their rarity makes them attractive to investors.
Light really enjoys itself in this 7.60 carat Trillion from Block D. Vibrancy and brilliance are the hallmarks of the stone as it truly sparkles. This attribute is admirably complimented by flawless clarity and more importantly, the most vivid, rarest colour cut directly on the blue axis. This is an extremely fine, investment grade Tanzanite by any standards.