create template by wrapping stiff material round the glass & trim to size. Building it over the original glass helps to hold the structure. Baby powder instead of non-stick liquid to help the clay slide off. Add a bottom!
Make with model magic clay, contour to wrist shape and poke holes, then weave the rest of the bracelet. Cool handmade pottery bracelet--could be made out of glass! Just make a barrete on the cuff bracelet mold. Could make more than just 1 at a time.