Samoflange

Samoflange densest known material in the Vendetta Online™ universe. It is a trade good, and masses 8000 kg/cu. Leviathans and capital ships will sometimes drop this substance.

To relate this density to real world materials: 1 cu of water is 100 kg, given that water is 1000 kg/m³ that means a "cu" is 0.1 m³ (excluding the mass of the container, of course). Given that, the mass of samoflange is 80,000 kg/m³.

For comparison, the densest known element is Osmium at 22,610 kg/m³ and the core of the sun is about 150,000 kg/m³. Some have speculated that samoflange is neutronium, but that is far more dense, by 11 orders of magnitude (assuming they mean matter from a neutron star).

Also see http://en.wikipedia.org/wiki/Density#Densities_of_various_materials and http://www.urbandictionary.com/define.php?term=Samoflange