mods that hopefully work for a TechAge-based pack

mods/techage_modpack/techage/items/usmium.lua

@@ -0,0 +1,28 @@
+--[[
+
+	TechAge
+	=======
+
+	Copyright (C) 2019 Joachim Stolberg
+
+	AGPL v3
+	See LICENSE.txt for more information
+
+	Usminum
+
+]]--
+
+local S = techage.S
+
+minetest.register_craftitem("techage:usmium_nuggets", {
+	description = S("Usmium Nuggets"),
+	inventory_image = "techage_usmium_nuggets.png",
+})
+
+minetest.register_craftitem("techage:usmium_powder", {
+	description = S("Usmium Powder"),
+	inventory_image = "techage_powder_inv.png^[colorize:#46728E:120",
+	groups = {powder = 1},
+})
+
+techage.add_grinder_recipe({input="techage:usmium_nuggets", output="techage:usmium_powder"})