The Copper Lantern is a decorative light source and the copper variant of the Lantern, featuring a distinctive green flame. It is crafted using a Copper Torch surrounded by eight Copper Nuggets in a 3×3 crafting grid. Like other copper blocks, the Copper Lantern oxidizes naturally through four stages — Unoxidized, Exposed, Weathered, and Oxidized — gradually changing color from bright orange to teal. Applying Honeycomb creates a Waxed Copper Lantern, preventing further oxidation.

The Copper Lantern emits a light level of 15, matching that of regular lanterns, and can be placed on top of blocks or hung beneath them. It connects seamlessly to Copper Chains and remains luminous regardless of its oxidation stage. The block is waterloggable, non-flammable, and drops itself when mined or when its supporting block is removed. With a hardness and blast resistance of 3.5, the Copper Lantern provides a durable and visually dynamic light source that complements copper-themed structures with a warm, evolving glow.