obsidian Synonyms

very dark black as a dog's guts melanoid tektite cristobalite lechatelierite moss agate tridymite tachylyte swart stygian starless sloe slater silex black as coal black as Newgate's knocker black as night utterly black totally black black in color completely black black as a skillet black as midnight black as pitch pitch-dark pitchy volcanic glass dark as night inklike coaler black as thunder black as the ace of spades scoria schorl granite fulgurite ebony ebon dark coulee coal-black charcoal calcite black bituminous basalt atramentous atramental inky jet