Exposed Chiseled Copper is a decorative copper block that has begun the oxidation process, giving it a slightly tarnished appearance. It naturally generates in trial chambers and can also be crafted from cut copper slabs or obtained through stonecutting.
It can be mined with a stone pickaxe or better; otherwise, it drops nothing. With a hardness of 3, it takes a moderate amount of time to break. Like other copper blocks, it continues to oxidize over time unless waxed with a honeycomb. It can also be scraped with an axe to revert to Chiseled Copper or struck by lightning to remove oxidation entirely.