Minecraft wiki entry for Copper_Ore, associated text: Copper ore can be generated anywhere on the Overworld in the form of blobs. In Java Edition, copper ore tries to generate 6 times per chunk in groups from 0 to 16, in layers 0 to 96, being most common in layers 47 and 48 and less common at the ends. Copper ore can replace stone, granite, diorite, andesite, tuff, and deepslate. Copper ore rarely replaces deepslate and tuff, generating within deepslate and tuff areas of layers 0 to 16. When it is replaced, it becomes the deepslate copper ore.