White Box Jewelers, Portsmouth, NH

Does anyone have any information about these folks, White Box Jewelers. My thoughts were that they were recommended about a year ago on Clark.com. However, I cannot find any reviews, and it looks as if the Better Business Bureau does not recognize them. We’re looking at a Lab Cut Diamond, their web site is easy to navigate, my wife has found a size, cut, and clarity that she likes, but I’m afraid to order if I can’t do the research. Thank you for any information you might have.