It's probably just a specific angle of the stone in the picture that looks like there's a chip. I would believe him if he says there's no chips. I've had excellent experiences with them.
That said the window would bother me. I like the pear Icy posted.
Are you making it into a pendant for the person or just giving them the stone? I would recommend using Starlanka for the setting if you're paying for the setting as well. They do flawless work.
I'm not affiliated with them. I've just used them for a few projects and been very happy with the results.
I am giving them the stone and they are able to do what they please with it ....the idea is for them to make it into a pendant
They have been great to work with and equally a great experience on this forum, you all have been great, I'll keep you posted and will get a side by side with the pear icy recommended to look at as well