Blocks / Polished Obsidian Bricks Polished Obsidian Bricks phantasm:polished_obsidian_bricks phantasm Physics Properties Explosion Resistance 7.0 Hardness 7.0 Friction 0.60 Speed Factor 1.00x Jump Factor 1.00x Block Behavior Has Collision Yes Is Air No Can Occlude Yes Requires Correct Tool Yes Waterloggable No