Boney Blocks are decorative blocks from the Lelyetia.
Boney Blocks can be broken quickly with any tool, but it will never drop as an item, not even if Silk Touch is used.
Boney Blocks generate as a part of Boney Dungeons, the only place where they can be found.
Boney Blocks are purely decorative blocks. They have no blast resistance, and thus are destroyed instantly by explosions.