An engagement ring that's unique, from a top jeweler, has a large stone and is still affordable

Does such a ring exist?

Something beautifully designed, with a gemstone (real one) in an impressive size.
Is from a world reknown European jeweller.
Yet is under $500.

It is possible as long as the large stone isn't a diamond. It can have diamond accents though.


14k Yellow Gold 7x7mm Pyramid Cab Genuine Peridot w/Diamond Ring (G-I, I1, 1/6 ct. tw.)
This beauty from Mondera (Mouwald group, from Europe but loved by American and British celebs) costs $415

This would make a wonderful engagement ring for a woman who likes green.