I’m a little confused, since you say the seller made the stone look more saturated, but your picture shows a stone that is about as dark as you’d want for dark blue. If the darkness is what you mean by less saturated, then OK, it might be a little darker than optimum, but I don’t really see it that way. The highest grades would have more purple in their blue than what I see. Color grading is hard without the stone in hand, but I would call it a 7 out of 10, and that would give me a jeweler’s memo price of $2700. So I’m thinking that maybe the stone is actually darker in person. However, I’d be surprised if you overpaid at $1250. This is one of those few times when I think that an amateur gem buyer may have actually lucked out. however, as i say, color grading is very subjective, I am not the best at it, and…I’m not sure this is actually tanzanite…you’d need an in person gem ID for that. -royjohn