Dark quark `stars': do they matter for Ωmatter?

The structure of a spherically symmetric stable dark `star' is discussed, at zero temperature, containing 1) a core of quarks in the deconfined phase and antileptons 2) a shell of hadrons in particular n, p, and <sup>–</sup> and leptons or antileptons and 3) a shell of hydrogen in the superfluid phase. If the superfluid hydrogen phase goes over into the electromagnetic plasma phase at densities well below one atom (10 fm)<sup>3</sup>, as is usually assumed, the hydrogen shell is insignificant for the mass and the radius of the `star'. These quantities are then determined approximatively: mass = 1.8 solar masses, radius = 9.2 km.