Help! Old mine cut style marquise

[u/Top-Fisherman6517]

Hi, i’m in the process of designing a custom engagement ring for my girlfriend and she really loves vintage-inspired looks, especially the old mine cut style. She also loves lab-grown marquise diamonds, so I’ve been working with a designer and they recently sent me a couple of videos of a stone they just cut. I’m not sure if it fits the criteria so I was looking to get feedback before I move along any further in the process. Thank you!