Hi James, Gaza superba is the only species that gets ooohs and ahhs from more than a foot away, because the rest of the Gaza species are rather small shells. Like many small shells though, some of them are quite beautiful. Gaza sericata, which you asked about (from Japan) is a very pretty shell. It has the pearly lustre of Gaza superba, but has intricate markings of yellow, tan and brown as well (unlike G. superba which is unicolored). However, G. sericata is only about 20 mm in diameter. Regards, Paul M.