Quartz Slab is a half-height decorative block cut from a Block of Quartz, occupying half of a vertical cube so builders can lay floors, ceilings, and layered facades without spending full blocks. Placing three Blocks of Quartz in a horizontal row on the crafting table yields six Quartz Slabs per recipe, and a stonecutter turns one Block of Quartz into two slabs for a thriftier option. Hardness 2 and blast resistance 6 match the full quartz block, so Quartz Slab keeps the same durability as solid stone at half the profile. The slab mines with any pickaxe and drops nothing when broken by hand. Quartz Slab was added in Java Edition 1.5 (the Redstone Update, February 2013) and in Pocket Edition Alpha 0.7.3, making the slab one of the oldest quartz decorative pieces.

Stacking two Quartz Slabs inside one block space fills a full cube, which lets builders form thresholds, windowsills, and ceilings at exact block-height precision without wasting whole Blocks of Quartz. Quartz Stairs, Quartz Walls, and Smooth Quartz Slab round out the stonecutter family, so the quartz palette covers nearly every shape a Greek-temple portico, modern living room, or Nether palace needs. Pair Quartz Slabs with dark blocks like blackstone or black concrete for high-contrast modern facades, or layer the slabs above sea lanterns for a popular glowing quartz-floor effect. The slab does not ignite from fire or lava, so Quartz Slab is also a safe decorative choice around Nether portals and hearths.