I saw this on display and was wondering what this (antique) step cut might be called. All it said was octagonal cut in a ring ca 1910, 1920. It was almost 4 ct I think it said, but clearly faced up smaller. Veeeeery expensive…
Could you share a smaller perspective shot if you have it?
As @Roselina wrote it looks like a mix between an asscher and emerald but with a messy/random periphery.