Blocks & Decoration I would like to suggest the means to craft obsidian furniture.

[RetroGenesis]

As well as a bottomless lava bucket similar to the Angler's reward: bottomless water bucket.

 

[YldaACPR42]

I don't see why not, support!

 

[DPh Kraken]

Obsidian furniture would be crafted with Obsidian Bricks at a Hellforge or greater station. Same amount as other furniture.

 

[Sigma90]

I prefer Obsidian furniture being non-craftable, like with Gold or Dungeon sets. It makes them more special.