I recently purchased a diamond, set in an engagement ring from James Allen. When I look at it from the side, it looks like there is a line or a crack, parallel to the girdle, halfway between the girdle and the culet. Is this a crack that I should be worried about or a line from just the way that diamonds are cut, or something else? Unfortunately, I'm not able to take a picture of the diamond and have it in focus. The diamond is a round cut, 1.5 carat, and supposedly VS1 clarity w/ GIA cert. Thanks!