minetest.register_node("minerals:limestone", {
	description = "Limestone",
	tiles = {"minerals_limestone.png"},
	groups = {cracky = 3},
})

minetest.register_node("minerals:obsidian", {
	description = "Obsidian",
	tiles = {"minerals_obsidian.png"},
	groups = {cracky = 2},
})

minetest.register_node("minerals:concrete_solid", {
	description = "Solid Concrete",
	tiles = {"minerals_concrete_solid.png"},
	groups = {cracky = 1},
})

minetest.register_node("minerals:chalk", {
	description = "Chalk",
	tiles = {"minerals_chalk.png"},
	groups = {cracky = 3},
})