I used Chinese coins for a jacket closure. Using black rayon cord, I made a Chinese knot that was larger than the hole in the coin. After wedging the knot through the coin opening, I was able to use the cord ends to affix the coin/knot to the garment. For some reason I’m thinking there was an article about Chinese coins in an issue since 2003; another issue also illustrated how to tie Chinese knots.
Have fun making this embellishment.