Also, don't make the common error of buying things with the S&C containing the letter 'G'. Irish, Scots, Americans and some others uses that symbol quite legitimately but for an English Freemason it has no meaning.
I would, however, advise waiting a while before getting items of this kind. About the only thing that a cautious Freemason might wear in public would be the little blue forget-me-not emblem (tip: research its origin). Rings and so on can be seen as a bit 'showy' and in some settings, particularly business, could easily be misinterpreted.