Crushed Obsidian

Crushed Obsidian is a type of block that falls like sand. It has a blast resistance of 600.

Obtaining
It is possible to obtain this through using a gas centrifuge on lava, blowing up obsidian with a nuke or thermo-explosion, putting it through a shredder, or ending a black hole with an antimatter cluster.

Usage
Despite being granular like sand and gravel and being affected by gravity, it still maintains a rather high blast resistance and hardness requiring a good pickaxe to be mined. Be creative! It has limited crafting uses, it is used to create a dense coal cluster (used for making artificial diamonds in Presses) and the crystal horn.

It would probably be most useful in the Ore Acidizer to be turned into Obsidian Bricks.

It can be smelted back into normal obsidian if need be.