server/res/adamantium.xml

<?xml version="1.0" encoding="utf-8" ?>
<eressea>
<resources>

  <resource name="adamantium" limited="yes" material="yes">
    <item weight="200" score="200">
      <construction skill="mining" minskill="8"/>
    </item>
      <modifier building="mine" type="skill" value="1"/>
      <modifier type="require" building="mine"/>
  </resource>

  <resource name="adamantiumaxe">
    <item weight="100" score="500">
      <construction skill="weaponsmithing" minskill="8">
        <requirement type="adamantium" quantity="1"/>
        <requirement type="log" quantity="1"/>
      </construction>
      <weapon cut="true" magical="true" skill="melee" offmod="2" defmod="-2" magres="0.30">
        <damage type="rider" value="3d4+15"/>
        <damage type="footman" value="3d4+15"/>
      </weapon>
    </item>
  </resource>

  <resource name="adamantiumplate">
    <item weight="100" score="2000">
      <construction skill="armorer" minskill="10">
        <requirement type="adamantium" quantity="3"/>
      </construction>
      <armor ac="7" penalty="0.1"/>
    </item>
  </resource>

</resources>
</eressea>