3e SRD:Encode Stone
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Encode Stone [Item Creation]
Prerequisite: Manifester level 1st+.
Benefit: The character can create a power stone of any power that he or she knows. Encoding a power stone takes one day for each 1,000 gp in its base price. The base price of a power stone is the level of the stored psionic power x its manifester level x 25 gp (treat a 0-level power as one-half level). To encode a power stone, a character must spend 1/25 of this base price in XP and use up raw materials costing half of this base price. Any power stone that stores a psionic power with an XP cost also carries a commensurate cost. In addition to the costs derived from the base price, the character must pay the XP when encoding the stone.