minetest.register_craft({
    output = "mcl_core:diamond",
    recipe = {
        { "mcl_core:coalblock", "mcl_core:coalblock", "mcl_core:coalblock" },
        { "mcl_core:coalblock", "mcl_core:coalblock", "mcl_core:coalblock" },
        { "mcl_core:coalblock", "mcl_core:coalblock", "mcl_core:coalblock" },
    },
})
minetest.register_craft({
    output = "mcl_core:diamond",
    recipe = {
        { "mcl_core:charcoalblock", "mcl_core:charcoalblock", "mcl_core:charcoalblock" },
        { "mcl_core:charcoalblock", "mcl_core:charcoalblock", "mcl_core:charcoalblock" },
        { "mcl_core:charcoalblock", "mcl_core:charcoalblock", "mcl_core:charcoalblock" },
    },
})

minetest.register_craft({
    output = "mcl_nether:ancient_debris 2",
    recipe = {
        { "mcl_copper:block",          "mcl_blackstone:blackstone",      "mcl_copper:block" },
        { "mcl_blackstone:blackstone", "mcl_nether:ancient_debris",      "mcl_blackstone:blackstone" },
        { "mcl_core:diamond",          "mcl_blackstone:basalt_polished", "mcl_core:diamond" },
    }
})

minetest.register_craft({
    output = "mcl_copper:copper_ingot",
    type = "shapeless",
    recipe = { "mcl_core:iron_ingot", "mcl_dye:orange" },
})