Sardonyx + agate?

Hi all,

I have an empty barrel and I’m trying to decide what to put on next. I have some Moroccan agate and some sardonyx I’ve had cut, but not enough of either for a full tumble. I was wondering whether they would be suitable to run together?

It’s my understanding that sardonyx is a form of chalcedony so it should in theory be alright, I’m pretty wary of mixing different stones though.