There are 8 gems that spawn under the elevation of 16. There can only be one vein per chunk making them very rare. They require a diamond pickaxe to mine (Ocean Pickaxe also works).
- Black Gem
- Blue Gem
- Brown Gem
- Green Gem
- Orange Gem
- Purple Gem
- Red Gem
- Yellow Gem
An ocean ingot can be made with two blue gems and an iron ingot.
Dark Steel Ore spawns under the elevation of 32. It can be mined with an iron pickaxe.
You can smelt dark steel ore into dark steel ingots.
Rust ore spawns under the elevation of 24. It can be mined with an iron pickaxe.
When mined it drops a rust shard.