Crafting with Cassite Crystal is a delicate process: DC 30 crafting is required and failure of 5 or more results in shattering the crystal.

Weapons forged from Cassite have the following properties: +3 to confirm critical hits due to never losing their edge. It ignores the armor bonuses from all armor and deflection bonuses. It also reduces the creation cost of magic weapons/armor by 15%. Weapons made from Cassite Crystal have a hardness of 30 and hp of 10/inch and is assumed to be of masterwork quality. However, Cassite crystal will shatter on a confirmed fumble attack roll… (x400 gp).

Armor imbued with Cassite has the following properties: Hardness 30, hp 25/inch, offers SR 20 to the wearer, including against magic missile (as the shield spell). Armor imbued with Cassite is automatically assumed to be of masterwork quality. However, if protecting against a confirmed critical hit, the crystal will shatter… (x800 gp).