Set Board

The thing is, instead of there being frosted and Clear Glass pieces, there's frosted and black. If there was clear instead of black the frosted would go on the frosted and would act as black. But as there is black does it mean that the frosted acts as white and goes on the clear square, or goes on the frosted and acts as black even though theres is black. May be a dumb question but I've had a difference of opinion with someone. I happen to think in my set, the frosted queen goes on the clear, as it is the lightest colour. Sorry if I've made this sound confusing!
by the way there are no black squares. Just black and frosted pieces and frosted and clear squares.