zbrush pendant

This is a pendant I was making in ZBrush recently.  I enjoy working on ZBrush, but one problem I think I will have is that I am working on something enlarged much larger than the size it will be manufactured.  I think I am often putting in details that will never show up in the final piece, after 3d printing, casting, and cleaning/polishing.  This pendant for example, the finished piece would probably be about 30mm high, but on my computer I am working on details with it enlarged to about 12"+ high.  I don't know how fine of details will make it through to the final piece.  I still haven't tried printing anything, so I don't know how it will be.