<?xml version="1.0"?>
<resource name="stone" limited="yes" material="rm_stone">
<item weight="6000" score="10" big="yes">
<construction skill="quarrying" minskill="1" reqsize="1"/>
</item>
<resourcelimit>
<modifier building="quarry" type="skill" value="1"/>
<modifier building="quarry" type="material" value="0.5"/>
</resourcelimit>
</resource>