Stone coffin.

[Jarko]

I'm having trouble unlocking the stone coffin. Does every single wood wall need to be converted to stone in order to unlock the stone coffin?

[Lesmir]

you need a place ( it can be small if you want ) that is entirely close ( wall and floor ) in stone

[Talamarie]

At least you need 4 walls and 1 floor so 44 Stone Brick and 24 Plank.
Build it on 1 square and that should validate the quest.

[Jarko]

I figured it out. every wall surrounding the heart including the doors need to be stone.the floor also has to be stone

[Primogen Incredabun]

How do I get stone walls and floors?

[Glyph]

Continue your quests in the upper left until you get the recipes