This clasp holds a small diamond orb with a sphere of steel at its center.

A crystal of adamant weaponry strengthens your weapon against damage.
This crystal improves the hardness of a weapon by 10.

Prerequisites: Craft Magic Arms and Armor, diamondsteel (SC 64).
Cost to Create: 1,500 gp (plus 400 gp for base item), 120 XP, 3 days.