In general, I've limited our buying to colorless Lab grown diamonds (if they're white diamonds)
This Lab Diamond is a pretty rare bird.
It looks exactly like a light brownish yellowish L-M color in an Earth mined diamond.
It matters because the price is so attractive.
The stone has that buttery glow you expect to see in stones of this color- the sparkle is amazing- because the diamond is cut so well.
The diamond is totally eye clean.