How to Get and Use Arkhium Lumenite in Genshin Impact

Arkhium Lumenite is a very rare quest item that you need to unlock Bravais' Secret Study. You'll need to find 7 ores to create Arkhium Stock, and then interact with the forge to turn it into Arkhium Lumenite. In this guide, we will show you how to get and use Arkhium Lumenite in Genshin Impact.

Prepare yourself well, because you need a lot of time to accomplish the goals - in our case, it was about an hour. Follow all the instructions below to learn what steps you have to take.

Genshin Impact: How to Get Arkhium Lumenite - Mysterious Ore Location

So, as we mentioned above, the first thing you'll have to do is get Arkhium Stock. This item will automatically appear in your inventory when you find 7 Mysterious Ore. It is quite difficult to do because you need to thoroughly explore areas and complete quests. So, here's where you can find all 7 ores:

• Mysterious Ore #1: Can be found in the Geode Mine Shaft during the Eye for An Eye quest. You will find yourself in a maze of colorful crystals, and in one of the nooks you can find the ore.
• Mysterious Ore #2: Moving southeast of the Central Laboratory Ruins, you can see a robot arm sticking out of the ground. The main landmark will be the Hilichurl Hut, which is nearby, so climb on the arm and take the ore.
• Mysterious Ore #3: The next ore is located in Kuisel's Clockwork Workshop. Simply accept the Road to Singularity quest to explore the terrarium and pick up the ore on the way.
• Mysterious Ore #4: Another one can be found during the Treacherous Light of the Depths Quest. It's a fairly linear quest path, so you'll definitely notice the item on the bottom as you swim through.
• Mysterious Ore #5: You'll find another one near the Allogravity-Condensed Water Body, which is located east of the Central Laboratory Ruins. Here you'll find a stone that you'll need to destroy with Jellyfish's Ability to find the ore instead.
• Mysterious Ore #6: This ore is located on the northern walls adjacent to the Experimental Field Generator. Climb to the top, and you'll see the Radiant Spincrystal and the ore next to it.
• Mysterious Ore #7: The last, and probably the most difficult to obtain, will be available to you after defeating the Thorny Cyst boss. You can find the boss in an underwater cave under a waterfall on a small island near Mont Esus East. After defeating the boss, an ore will appear instead.

So when you collect all the ores, the Arkhium Stock will automatically appear in your inventory, and all you have to do is transform it into a Forging Press Device.

Read more: How to Retrieve the Survey Anchor – Genshin Impact Institute Dormitories

Genshin Impact: How to Process Arkhium Stock Into Arkhium Lumenite

So, the last thing you need to do is to process Arkhium Stock Into Arkhium Lumenite. To achieve this, first travel to the Abandoned Production Zone point and then go to the Geode Mine Shaft. Once you arrive here, jump into the water and swim downstream, moving from one pond to another until you reach the aquarium corridor. If you're here, you've done everything right and will soon encounter an enemy guarding the gate. After killing him, you can move on to get to Bravais's Press Work underground and complete the challenge. So, here's what you'll need to do:

1. Interact with the Forging Press Device to put Arkhium Stock on it.
2. Now, you'll need to get the Handwheel to place it on the pipe with the gas leak. It's not difficult, it's located near two Clockwork Meka enemies, southwest of the Forging Press Device.
3. Once you have the Handwheel, you can interact with one of the pipes to direct the gas. Insert the Handwheel you just found, and turn it until the indicator points north.
4. After that, go to the other pipe that already has a Handwheel and point it to the south.
5. Now, go to the last pipe and point the indicator to the west.
6. Last, go to the mechanism and activate the power system. When you see white circles, don't forget to click on Arkhium Stock.
7. After that, enemies will appear in the arena, which you need to deal with and do not forget to cool the mechanism using Hydro or Cryo.
8. Next, go to the east of the Forging Press Device to find the Hydroculus and the rock, which you need to destroy to fill the area with water.
9. Now click on the Arkhium Stock a few more times.
10. After a while, the mechanism will stop working due to the large amount of water, so you'll need to solve this problem.
11. Dive into the water and swim west to cut the Fontemer Seagrass.
12. Use Medusa's abilities to clear the drain from enemies such as Red Meanies and Mini Meanies.
13. When you do, activate the drainage system behind the power mechanism and interact with the Arkhium Stock to submerge the Press Workshop in water.
14. Now, go back and pick up the newly formed Arkhium Lumenite.

Well, now that you've got Arkhium Lumenite, you can use it to get some nice bonuses.

Genshin Impact: How to Open the Door to Bravais' Secret Study

As we mentioned above, Arkhium Lumenite is used to open the door to Bravais' Secret Study. Head to the Waypoint, which is located near the southeast of the Experimental Field Generator boss area. From there, take the flight to reach the pit shown in the screenshot above.

How to Get Not So Straight Is the Gate Achievement in Genshin Impact

When you get down into the pit, you'll see a door and a mechanism next to it. Insert the Arkhium Lumenite to get inside and get the Not So Straight Is the Gate achievement. In this small construction, you can also get the following items:

• Golden Bird's Shedding 5-Star Artifact.
• Luxurious Chest.

By the way, while you're still here, check out our guide on how to get all the Credit Coupons in Genshin Impact.

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