The Hardened Lava Inlay Wall is a wine-red building-block with parallel lines of four sides, and four small window-like lava-colored squares on two sides that do not glow in the dark. It can be crafted in your Crafting Menu (default key "Q") or at any Crafting Table in worlds created before R22 on September 16th 2015, after the recipe has been unlocked upon buying it in the Store as a part of the "Decorative Lava Pack" (as of R24 in November 2015). To craft 8 (blocks of) Hardened Lava Inlay Walls, you'll need (as of R24 in November 2015):