Minecraft wiki entry for Raw_Copper, associated text: Copper ore and deepslate copper ore mined with a stone pickaxe or better drops 2–5 units of raw copper. If the pickaxe is enchanted with Fortune, it can drop extra raw copper, allowing for a maximum of 20 units per ore block with Fortune III, or an average of 7.7 units of raw copper per ore block. If the ore is mined using a pickaxe enchanted with Silk Touch, it drops the ore block instead.