minetest.register_node("mcl_core:crystal", {
        description = "Crystal",
        _doc_items_longdesc = "Crystal Block"
        _doc_items_hidden = false,
        tiles = {"mcl_core_crystal.png"},
        is_ground_content = true,
        stack_max = 64,
        groups = {},
        drop = 'mcl_core:crystal',
        sounds = (),
        _mcl_blast_resistance = 30,
        _mcl_hardness = 1.5,
})