In Borderlands 3, you can use Eridium to unlock skins and particularly cool weapons. You can mine and farm Eridium – how to do that, you can find out here.
How do I get Eridium? At the beginning of the game, you can only receive Eridium randomly. So open as many boxes, crates, and cabinets as possible to maybe get some Eridium. Some larger enemies also drop Eridium.
Also, keep an eye out for challenges on the map that reward Eridium.
Farming and mining Eridium
This is how you specifically farm Eridium: In the later stages of the game, you can mine the large, purple crystals scattered across the planet. However, you will need a certain tool for that.
When can I start mining Eridium crystals? As soon as you have opened the first vault during the main campaign. This happens in Chapter 10. The game has a total of 23 chapters.
You must defeat the boss guarding this vault. This will give you a new melee weapon with which you can break the purple crystals. From the crystals, you will then receive Eridium.
Using Eridium – What you need it for
What do I need Eridium for? With this currency, you can buy cool skins as well as special items. The Eridium dealer can be found at your home base, Sanctuary.
At “Crazy Earl”, you can buy black market cosmetics or get special gear at the “Veterans’ Goods”.

There is also an endgame weapon that shoots you new loot. This weapon requires a bit of Eridium as part of its ammunition.
Can I only get skins through Eridium? No. You sometimes find skins just like that while playing. These skins are different from those you can buy at Crazy Earl. Sometimes there are cosmetics as a reward from quests.
I found the lower bird collar completely randomly. But don’t ask me how and where – it suddenly appeared in my inventory.

New skins are also available through VIP codes. How to get these codes and where you can redeem the points can be read in our article about it:
If you prefer to save your Eridium for strong gear, there are other ways to get cool skins that rival Eridium skins.
What is Eridium actually? This material has become currency and is traded on the black market in Borderlands. It was left behind by the alien race of the Eridians, who first initiated the hunt for vault treasures. You can find out everything about it in the story of Borderlands.
Want more tips for Borderlands 3? Then go this way:
- Tips and tricks I wish I had known before starting Borderlands 3
- FL4K is the best solo class for Borderlands 3 – Use this build
- Borderlands 3: Shift Codes and VIP Points – Get cool skins
- Borderlands 3: Coop, Split-Screen, Crossplay? Here’s what you need to know
- Borderlands 3: How to fight Balrog from Lord of the Rings and get his weapon

