Oh, I'm sorry! I should've added the description!
It's the same ring, just the first 4 pictures were taken in the electrical light, and the other four - indoors with day light. It looks more blue on the second set than it actually does in reality, I assume it's because of the camera's bluish flash which I couldn't figure out how to shut off. I didn't adjust the color settings of the photos and left them as is.
It's 2.5 ct RB asha in BTD's Tiffany repro setting. Size 3 3/4, palladium.