diff --git a/crafts.lua b/crafts.lua
index 634ea9b..5b614be 100644
--- a/crafts.lua
+++ b/crafts.lua
@@ -298,6 +298,21 @@ minetest.register_craft({
 	}
 })
 
+minetest.register_craft({
+	type = "shapeless",
+	output = "default:cobble 8",
+	recipe = {
+		"gloopblocks:pumice",
+		"gloopblocks:pumice",
+		"gloopblocks:pumice",
+		"gloopblocks:pumice",
+		"gloopblocks:basalt",
+		"gloopblocks:basalt",
+		"gloopblocks:basalt",
+		"gloopblocks:basalt"
+	}
+})
+
 minetest.register_craft({
 	output = "gloopblocks:fence_steel 1",
 	recipe = {