Hi, I'm a newbie. I'm trying to make a ring like the one below with the yellow background.

What I did was, I created some NURBS curves circles (6 of them), and lofted them to get the solid and cornered look.

The problem is that it looks blocky, as you can see from the picture below. Is there a way for me to smoothen this out but still have those edges/corners on the top, just like the circle in the image with the yellow background?

Thank you!