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Moat Cailin, by Thomas Denmark © Fantasy Flight Games

Basalt is a volcanic rock found in the known world.


The curtain wall of Moat Cailin was made of enormous blocks of black basalt.[1] When wet, the massive stones which remain appear to be coated in fine black oil.[2]

Blackhaven, seat of House Dondarrion, has forbidding walls of black basalt,[3] and Kayakayanaya has walls of black basalt, black iron, and yellow bone.[4]

The bridge at Breakwater Castle is made of black basalt.[5]


  1. A Game of Thrones, Chapter 55, Catelyn VIII.
  2. A Dance with Dragons, Chapter 20, Reek II.
  3. The World of Ice & Fire, The Stormlands: The Men of the Stormlands.
  4. The World of Ice & Fire, The Bones and Beyond.
  5. A Dance with Dragons, Chapter 9, Davos I.