YES; YOU NEED DIAMOND CHESTPLATE AND A NETHERITE INGOT TO MAKE A NETHERITE CHESTPLATE; DIAMOND SWORD AND A NETHERITE TO MAKE A NETHERITE CHESTPLATE; YES; DIAMOND TOOLS AND A NETHERITE TO MAKE A NETHERITE TOOLS; YES; SO IT MEANS I NEED A DIAMOND BLOCK AND NETHERITE TO MAKE A NETHERITE BLOCK; NO, YOU NEED 9 NETHERITE INGOT