Cufflinks- Cuttlefish Bone casting using coin silver (23.5gramTW).
1/2"×3/4"×1/8" Dimension. 
Similar to the tufa stone used in the Southwest US, cuttlefish bone is carved to create a negative space that represents the eventual metal object to be cast. Metal is poured directly into the bone, which is cut in half and bound together with wire to create a mold. Multi-part molds are also possible!