Sorcerers gain their spells from innate, inborn power.
Because of this, they have no need to worry about material
components—they are, in essence, their own material components.
Spells with costly material components require
little extra personal power on the sorcerer’s part. He still
does not need to obtain the material component, but he
must instead pay a price in experience points for casting
spell. The sorcerer pays 1/25th of the gold-piece cost of
component in XP (minimum loss of 1 XP). Thus, if a sorcerer
casts stoneskin, which requires 250 gp worth of diamond
dust, the sorcerer instead pays 10 XP (250 divided by 25
10). Spells that already require an expenditure of experience
points are handled normally.