You expect a lot for R15! Find me a gem lab that certifies Tanzanites for free and I'll provide certification with pleasure. I've sold 3800 of these, and every one in 500 I get an adverse rating, but then I suppose there's one born every day of the week! As far as the colour goes, the image in the auction was taken with a digital microscopic photography system, which gives a result no human eye can ever hope to match.