What type of setting is this?

[KingKuda]

I'm looking at settings at the moment and know that my girlfriend is after sometime with a low profile that is very simple.

Does anyone know what type of setting this is? Will it work with a solitaire or will you see far too much platinum?

 

[Queenie60]

Looks like a halo with pave shank

 

[Acinom]

Looks like a halo with pave shank

With an open gallery (no donut)