Astrillium

Astrillium*: Identical to Adamantine but only found in meteorites. Both ancient and modern metallurgists have devised numerous alloys that mix skymetals with other materials. Many of these are highly specialized, but one deserves special mention: Astrillium. This dull gray metal is an alloy of adamantine and iron. Though it has hardness 15 and 30 hit points per inch of thickness, astrillium is half again as heavy as iron and difficult to work with. The material of choice for ship hulls and robot frames but is generally sought after only by collectors and eccentrics as a material for new items or other projects.