I still remember the thrill of descending into The Chasm's Underground Mines back when update 2.6 launched. Now in 2025, this treacherous zone remains a cornerstone for adventurers seeking precious resources. Among its glittering rewards, Lumenstone Ore stands out as a game-changing material needed for upgrading the essential Lumenstone Adjuvant gadget. Without it, you're literally exploring blind in the pitch-black tunnels. What struck me most was how these glowing minerals aren't just lying around - you've gotta earn them through quest progression. Trust me, having a maxed-out Adjuvant transforms The Chasm from frustrating to fascinating, especially when hunting Lumenspar clusters. 🔍

Unlocking Access Through Chasm Delvers Questline

Before even thinking about ore hunting, you'll need to dive into the six-part "The Chasm Delvers" world quest series. I learned the hard way that skipping this locks you out of the entire underground network. Completing these missions gradually reveals the labyrinthine map while teaching mechanics like dark mud purification. Pro tip: Snag every Lumenspar you spot during these quests! You'll need 80 total for Adjuvant upgrades, and backtracking later is a nightmare. The questline naturally guides you to the first ore location while establishing crucial environmental awareness.

First Ore: Chasm Spelunkers Reward

Your inaugural Lumenstone Ore comes as a quest completion prize during "Chasm Spelunkers" - the third chapter in the Delvers saga. When I first descended near the mining camp, investigator Zhiqiong had me examine a nearby Lumenspar. After reporting back, she handed over the radiant ore like a baton pass to deeper exploration. This automatic inventory addition felt satisfyingly organic. The location near the initial basecamp makes it impossible to miss, serving as both tutorial and treasure. What impressed me was how this clever design teaches ore importance while advancing the narrative.

Second Ore: Stony Halls Vertical Drop

Prepare for some verticality when hunting the second specimen! After finishing "The Heavenly Stone's Debris" (quest part four), head to the Stony Halls area. I typically teleport to the northeastern waypoint and glide downward toward jagged rock formations. The ore glows conspicuously right before a sheer cavern drop - seriously, don't overshoot it! This location tests your gliding precision while revealing how quest progression physically alters environments. That mechanism activation during the quest? It literally creates the path to this prize. The adrenaline rush from nailing the landing never fades.

Third Ore: Fatui Camp Secret Cache

The final ore requires real detective work. West of The Glowing Narrows (near those bioluminescent Starshrooms), you'll find a locked tunnel. Here's the kicker: You need the "Key to a Stony Hall" from completing "Perils in the Dark" - the fifth quest chapter. I remember feeling like a treasure hunter unlocking this clandestine Fatui campsite. The ore rests beside abandoned research notes, hinting at the Fatui's own mineral obsession. This location exemplifies The Chasm's layered secrets; what appears deserted holds endgame progression keys.

Why These Ores Revolutionize Exploration

Upgrading your Lumenstone Adjuvant to level 8 isn't just convenient - it fundamentally changes exploration. I've clocked hundreds of hours in The Chasm, and that Lumenspar radar function? Pure magic. By reaching maximum gadget level, you gain:

• 📡 250-meter detection radius for Lumenspar

• ⚡ Dark mud resistance boost

• 💎 Enhanced ore/chunk detection

• 🌟 Permanent area illumination

It essentially becomes your spelunking Swiss Army knife. Without these three specific ores, you're stuck at lower levels missing critical functions. The progression curve feels brilliant - each upgrade tier gradually unveils The Chasm's true scale and secrets.

Honestly? Grab your best exploration team and revisit these caverns today. Those ores aren't just items; they're keys to unlocking The Chasm's soul. What hidden wonders will your upgraded Adjuvant reveal? ⛏️✨