Hi all, this ironsand is called satetsu in Japan and is used to smelt tamahagane (jewel metal) which is used to make Japanese swords from, its a very good iron ore, with very little sulphur or phosphorus content so makes for a real good steel, with less carbon and added meteorite it would make most excellent keris pamor, "washed" high carbon tamahagane would be ideal for the core (very hard and tough steel) Costs about £60 a kilo in Japan though.
