I have a friend that wears something similar as an e-ring. It's beautiful and sapphires are still pretty popular as engagement rings.
I would go to Tiffany and make sure that you like the size. Some of the larger Legacy rings do look like cocktail rings and you may find too large of a ring that shape uncomfortable.
It's beautiful!!! I love it but wouldn't want it for an e-ring personally, but as a rt hand ring.
But who cares what I think!? Whatever YOU like is really what matters!
If it's what you want then I definitely say go for it! I love the style of the ring, very engagement ring appropriate and if you prefer some color over a diamond then it's perfect.
Lovely ring! Really amazing.
You will wear an e-ring for quite a long time though, so you have to be sure that this color is neutral enough for everyday wear. If its is, then go for it!!!