Cabochon: http://www.lesperlesdepaline.fr/perlerie/pages.php?pageid=1 Beadandbutton: http://www.beadandbutton.com/bnb/Objects/PDF/bnb-onf0309.pdf http://www.beadandbutton.com/bnb/Objects/PDF/bnb-pa0209free.pdf...