Mundane crystal can be used in place of metal in weapons or armor, using a special forging process. The fortified crystal possesses the properties of a similar masterwork steel weapon or armor, except for visual appearance. Weapons and armor made of mundane crystal cost the same amount to make as their masterwork counterparts. Any item could potentially be made with mundane crystal. Mundane crystal properly forged has 25 hit points per inch of thickness and a hardness of 8.
Deep crystal is crystal of above-average quality found at the hearts of large veins or deposits of mundane crystal. Deep crystal is renowned for its strength and its psionically resonant nature. Mundane crystal is used for many items of psionic manufacture, such as dorjes, power stones, and psicrystals. Deep crystal is a better grade and allows users to channel power through the item made of Deep crystal. Deep crystal has 30 hit points per inch of thickness and a hardness of 10.