In order to activate the Igneous Altar, the players have to place three fragments in their respective pillars after placing all 11 Pearls in front of it. While the Sulfur Fragment Pillar is easy to locate, the remaining two require a lot of exploration. So, if you are finding it difficult to find the Fragment Pillars in Scoria Reach, here is a detailed guide about it.
How to get Fragments in Scoria Reach
Before reaching the actual location, you must secure the three Fragments(Sulfur, Infernal & Obsidian) to place them in their respective pillar. For this, you need to collect a lot of Obsidian, Ashy Pearl, Sulfur, and Igneous Pearl, which are obtained as an additional drop while fishing for Lava Clams. Go towards the exclusive Pool at (-5102, 162, -1177), visible using the Fish Radar opposite the Ashbrook Town. Here, keep fishing until you get a lot of the mentioned pearls.

Once you have that, enter the Scoria Reach Mines using the elevator at the GPS (-4972, 145, -1577). Now, you will find a lot of Crab Miners roaming around the area. Give your pearls to these Crab Miners and start mining from the mineral ores around the cave. After five minutes, you can interact with the Crab Miners to get random rewards, including the type of Fragment associated with your pearls. So, if you give a lot of Igneous Pearl, you have a higher chance of getting Infernal Fragments. Not always, but higher.
- Sulfur Pearl -> Sulfur Fragment
- Obsidian Pearl -> Obsidian Fragment
- Igneous Pearl -> Infernal Fragment
All three 3 Fragment Pillar Locations in Fisch
Below, you can find all three Fragment Pillar Locations in Fisch, where you have to place the respective Fragments after placing the Pearls.
Sulfur Fragment Pillar Location

You can find the Sulfur Fragment Pillar at GPS (-5180,158, -1192) opposite the Lava pool, opposite the Ashbrook Town.
Obsidian Fragment Pillar Location

The Obsidian Fragment Pillar is inside the secluded cave to the right of the Scoria Volcano. After entering, you can find it on the right side of the cave at GPS (-5643, 163, -1693).
Infernal Fragment Pillar Location

The final Infernal Fragment Pillar is at the top of the mountain at GPS (-5604, 262, -1736). Just take the path towards the right side of the Volcano to reach the top of the Scoria Reach.
Fisch Fragment FAQs
You can get Pearls by fishing for the Lava Clams inside Scoria Reach. Also, you can earn Pearls while getting the default Clams at Roslit Bay.
Players must activate the Igneous Altar in Fisch to get the Igneous Rupturer Rod.
The Infernal Fragment is the most challenging one to get in Scoria Reach, as the Igneous Pearl is an Exotic item, which in turn has to be given to the Crabs to earn a chance of getting the Infernal Fragment.
For more on Fisch, check out All 21 Fish in Scoria Reach (100% Bestiary) - Fisch or How to Get Microphone Rod in Fisch – Twitch Quest Guide