How to Get the Lumenspar Behind the Chasm Locked Gate

The Lumenspars behind Locked Gates in the underground mines of the Chasm are accessed by obtaining the Mining Key and the Treasure Hoarder Map. See how to get the Lumenspars in this guide for Genshin Impact!

Opening the Lumenspar Gate in Ad Hoc Main Tunnel

Get the Miner's Key

You can get the gate key from the path between The Serpent's Cave and the starting area of the Underground Mines in the Chasm. If you cannot access this area, you may need to go around from The Serpent's Cave to unblock this path.

Miner's Key Location

Use the Miner's Key on the Gate

To get the Lumenspar in the Ad-Hoc Main Tunnel of the Chasm's Underground Mines, open the locked gate with the Miner's Key.

Location of the Gate

After obtaining the key, go west of the teleport waypoint and drop down until you see the gate.

Get the Lumenspar on the Side of a Ledge

After accessing the inside of the gate, on the right side of the area you will come across another gate. Open the door via the lever on the right, and then immediately look around to your left. The Lumenspar should be by the rock ledge!

All Lumenspar Locations

Beware of the Black Serpent Knight

Skeld, a Black Serpent Knight, is also inside the gate. He drops an Orb of the Blue Depths.

All Orb of the Blue Depths Locations

Opening the Lumenspar Gate in The Chasm Main Mining Area

Obtain the Treasure Hoarder Map Fragments

In the northeast area of the The Chasm underground mines, the Lumenspar can only be obtained from the inside of the gate, and you can only access it by finding the secret entrance as mapped by the Treasure Map Fragments in The Chasm.

There are two Treasure Hoarder's Map Fragments: one is found in Lumberpick Valley, while the other is found in the Underground Mines as indicated in the maps above. See the full guide about the fragments on the guide below:

How to Get Treasure Map Fragments

Go to the Secret Location Indicated in the Map

Combining both Map Fragments reveals the location of the secret entrance. In between Glaze Peak and Tiangong Gorge, the Treasure Hoarders are hiding a trapdoor under the camp's tent.

Reveal the hidden trapdoor

Burn the grass to reveal the trapdoor, then enter to get inside the locked gate location in the Underground Mines!

Related Guides

The Chasm Map Guide

Helpful Guides for The Chasm

The Chasm Puzzles and Features

The Chasm Puzzles

Guides for The Chasm Features
The Lost Valley Puzzle	Unique Rock Pillars
Old Chou's Treasure Hunt	Treasure Map Fragments
Mysterious Letters	Fossil Locations
Activate the Mechanism	Ring the Two Bells
Lumenspar Locked Gate	Memorial Offerings
Follow the Water's Flow	Purify the Large Crystal

The Chasm Features

Guides for The Chasm Features
Spoutrocks	Bedrock Keys
Cage-Shaped Geo Formation	Dark Mud and Oozing Concretions
Glowing Pyramids

The Chasm Quest Guides

Items in The Chasm

All Chasm Items
Lumenstone Ore	Lumenstone Adjuvant	Lumenspar
Frostglaze Crystal	Starshroom	Miner's Key
Archaic Stone	Orb of the Blue Depths	Cup of Commons
Warrior's Spear	Skyfeather	Sundial of Ages
Helm of Warding	Flower of Farsight

Living Creatures in The Chasm

Enemies in The Chasm

The Chasm Enemy Guides
Ruin Serpent Boss	Black Serpent Knight: Windcutter	Floating Hydro Fungus

Wildlife in The Chasm

All Chasm Creatures
Luminous Seelie	Bluethunder Weasel	Lucklight Flies