It appears to have a window but depending on what you are looking for, it could be an acceptable stone. The spinel is angled to the side a little so I expect the window to probably be bigger than what is seen in the picture. Colour looks good if it is as pictured but has some dark areas. Not sure how to inteprete that. How big is this stone? Also, if it is inexpensive, it might be worth requesting a handshot or at least additional pictures to check for the above-mentioned concerns.
4+ct, almost 11x8mm, I have no idea about any other colors. I am concerned about the inclusions along the lower 1/2 of the stone in the hand shot (the other picture also) and it's cheep, too cheep, $763.00.
Are those really inclusions? I cannot tell in the small pictures. If so, then perhaps that is why pricing is very low. Otherwise I would suspect major photoshopping or even a synthetic stone.