For a bone graft composition having CaSO4.???H2O and sterile water as the mixing solution, specific compositions are a function of the plasticizing substance used in the composition. [0043] In an embodiment having hydroxypropyl cellulose (BPC) as the plasticizing substance, the composition can include 100 parts by weight of calcium sulfate, e.g., CaSO4.???H2O; about 2 to about 7 parts, e.g., about