Depending on its exact composition it can be a sticky, black liquid or an apparently solid mass that behaves as a liquid over very large time scales.
dᵻpˈɛndɪŋ ˌɔn ɪts ɛɡzˈækt kˌɑːmpəzˈɪʃən ɪt kæn biː ɐ stˈɪki, blˈæk lˈɪkwɪd ɔːɹ ɐn ɐpˈæɹəntli sˈɑːlɪd mˈæs ðæt bᵻhˈeɪvz æz ɐ lˈɪkwɪd ˌoʊvɚ vˈɛɹi lˈɑːɹdʒ tˈaɪm skˈeɪlz.