Game Tiles Dungeon Floor Pack A is made of "Dwarvenite" and expands the Games Tiles Base Set. This pack was initially available as an Add-On pack to the Game Tiles Kickstarter. The pack comes in both painted and unpainted versions.
The Game Tiles Dungeon Floor Pack A comes complete with these 7 pieces:
(5) Floor, 4x6
(2) Floor with Stairs