This is a beautiful 3-stone 18k solid gold ring. The design is based on ancient Etruscan ring designs. The Etruscans pre-dated the Romans in what is now southern Italy. I like this design because it has a lot of intricate granulation and twisted wire details.
The center stone is a medium-green tsavorite from Tanzania. Tsavorite is a rare form of garnet that is known for its unique shades of green and has become quite expensive in recent years (see link below for more information). This piece has wonderful bright green color but it does have a few inclusions (veils) beneath the surface.
The accent stones are deep-blue gem silica from the Ray mine in Arizona. This top-grade material was selected because it goes well with the green of the tsavorite.
The ring at its widest point is approx. 5/8” wide (at the front) and the band tapers to approx. 3/8” at the back. This is considered a wide-band ring so you might consider sizing based on rings you wear that are comparable.