Marble blocks are used in the Construction skill. They can only be bought in Keldagrim from the Stonemason for 325,000 coins. Unlike Limestone bricks, Marble blocks cannot be made by players. Marble blocks are commonly used to build high-level furniture and decorations in a player-owned house. Players can begin using marble blocks once they reach level 60 Construction; the first item that can be made that requires them is an oak throne.