You can use it as a , put it together with the resin and cast it in the mold. Great use on seal stamp,pendant,rings and all kinds of resin craft. Purely hand-broken, cuts in the fracture, natural shape, each piece is different, not dull. Please allow 0-1cm error due to manual measurement. Please make sure you do not mind before you pay. Each piece varies in pattern, texture, color . As they are from natural wood.