Diamond Treasure Chests can spawn on Corrupted Blocks in unlit areas like can be found in the Corruption Layer, which is the deepest level of any Creativerse-world.
Diamond Treasure Chests can also spawn/appear at any height in Creativerse-worlds on dark arenas with floors made of corrupted blocks.
These treasure chests will only spawn in complete darkness, so adding roofs and walls to any spawning arena/farm will be of benefit, otherwise these chests can merely spawn at night. Sunlight or artificial light will not make chests vanish that have already spawned.
Artificial light like torches or lanterns will hinder chests from spawning. Objects with glowing parts that do not illuminate the surrounding like LEDs or Pressure Plates, as well as natural blocks that provide illumination like Wildwood Flowers will not prevent these chests from spawning.
Diamond Treasure Chests can contain:
5-10 units of Gunpowder,
8-16 Brown Mushrooms,
10-20 pieces of Coal,
10-20 units of Obsidian Ore,
10-20 units of Iron Ore,
8-16 Explosive Bombs,
8-16 Stun Bombs,
45 Red Wood Walls,
2-44 Advanced Extractors,
1 Iron Mining Cell (very rarely),
1-2 Iron Swords (rarely),
1-2 parts of Iron Armor (not often),
8-32 Wood Burning Lamps,
- and a range of rare Recipes for uncommon building blocks, roof blocks and colored beacons.
Diamond Treasure Chests rarely contained Arctek lighting, Arctek tables and/or Arctek chests in earlier versions of Creativerse, which might still be the case, however extremely rarely.
Unlooted treasure chests can and will despawn when (all) player characters leave out of sight (and/or log out). Half-looted chests will prevail a little longer, but will despawn if the player/s do/es not return quickly.