Earth to Stone

Regular
Turns an item of earth or clay into hard stone (but not gemstone), or
turns an item of stone into a simple metal like bronze or iron. For double
energy cost, turns an item of earth or clay into metal.

Duration: Permanent.
Cost: 3 per cubic yard (minimum 3).
Prerequisites: Magery 1 and Shape Earth.

Item
Staff, wand, or jewelry.
Energy cost to create: 300.