Price (Item Level): 300 gp (2nd) (least), 1,400 gp (5th) (lesser), or 3,400 gp (8th) (greater)
Body Slot: — (armor or shield crystal)
Caster Level: 9th
Aura: Moderate; (DC 19) transmutation
Activation: —
Weight: —
This clasp holds a small diamond orb with a sphere of steel at its center.
A crystal of adamant armor strengthens your armor or shield against damage.
Least: This augment crystal improves the hardness of a suit of armor or shield by 2.
Lesser: This augment crystal improves the hardness of a suit of armor or shield by 5.
Greater: This augment crystal improves the hardness of a suit of armor or shield by 10.
Prerequisites: Craft Magic Arms and Armor, diamondsteel.
Cost to Create: 150 gp, 12 XP, 1 day (least); 700 gp, 56 XP, 2 days (lesser); 1,700 gp, 136 XP, 4 days (greater).
Source: Magic Item Compendium, page 24.