Thank you for your enquiry. This is a gorgeous pendant by the way!
All of our Tanzanites in the 18K Gold settings are AAA quality, whereas the Tanzanite stones in the 9K Gold settings are AA quality.
We do also hand pick the tanzanites to make sure that they really do offer great value for money! We do offer a 30 days return policy if the ring or the colour is not to your liking, as long as the size is between a J and Q.
If you have any further queries please do not hesitate to contact us.