stickpin conversion

Found this lovely pendant on etsy and discovered in the description that it was a stickpin converted into a pendant.  Why have I never thought of this before?!  It would be a relatively easy conversion, it's a wonderful reuse of jewelry that would likely not get used often, if at all, and from a brief online search, it seems that stickpins go for much less than a pendant does of equal size and quality!  Brilliant!