Arknights Endfield Amethyst Ore Location and Use Guide

What to know

• Amethyst Ore unlocks in Valley IV and gates multiple story and industrial objectives
• Poor processing choices can cause long, forced downtime
• Amethyst Parts are the most critical derivative early on
• A simple automated loop prevents all Valley IV bottlenecks

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If you’ve just reached Valley IV in Arknights: Endfield, Amethyst Ore is likely the first resource that slows you down. Until now, you could mine casually and craft on demand. Amethyst changes that expectation entirely. It feeds story quests, industrial explosives, repairs, and mid-tier production chains all at once—making it the game’s first real factory-planning checkpoint.

Arknights Endfield Amethyst ore details

Aspect	Details
Resource type	Mid-tier mineral
Region	Valley IV
Best node	Hub near Core AIC
Key derivative	Amethyst Parts
Processing chain	Ore → Fiber → Parts / Components
Primary uses	Explosives, repairs, electronics
Common issue	No Parts production
Best solution	Automated loop

What Amethyst Ore is and why it matters in Valley IV

Amethyst Ore is a mid-tier mineral introduced once Valley IV opens. Unlike early minerals such as Originium derivatives, Amethyst is required simultaneously for:

• Story-critical quests
• Infrastructure repairs
• Industrial explosives
• Mechanical and electronic components
• Continuous AIC production chains

Because these demands overlap, converting Amethyst the wrong way can leave you waiting 20–30 minutes with nothing productive to do.

Arknights Endfield Amethyst Ore locations

Amethyst appears only in Valley IV and is extracted from fixed mineral beds.

Valley IV – Hub area near the Core AIC

This is the most important Amethyst location.

• Close to your Core AIC
• No enemy pressure
• Short power routing distance
• Ideal for permanent automation

If you only automate one Amethyst site, this should be it.

Valley IV – Valley Pass plateau

A raised bed that requires extended power lines. It works well as a secondary source once your grid expands.

Valley IV – Aburrey Quarry

Multiple nodes spread across the area. This location is best used later, when Amethyst demand increases sharply.

How to mine Amethyst in Arknights Endfield

Mining itself is straightforward, but placement matters.

1. Place an Electric Mining Rig directly on an Amethyst node.
2. Connect the rig to your power network using pylons or relay towers.
3. Link the rig to your AIC depot so ore transfers automatically.

Once powered, the rig will continuously harvest Amethyst Ore with no manual input. The real problem begins after mining—during processing.

How Amethyst Ore is processed

Amethyst Ore is never used directly. Its value comes from refined derivatives.

Amethyst Fiber from the Refining Unit

• Refining unit Input: Amethyst Ore
• Output: Amethyst Fiber

Fiber is the base intermediate material and feeds nearly every Amethyst-related recipe.

Amethyst Parts from the Fitting Unit

• Fitting unit Input: Amethyst Fiber
• Output: Amethyst Parts

Amethyst Parts are the most important early derivative. They are required for industrial explosives, repairs, and multiple Valley IV objectives.

Optional Amethyst derivatives

Depending on your factory setup, Amethyst Fiber can also be converted into:

• Amethyst Powder via the Shredding Unit
• Amethyst Components via the Gearing Unit

These become more relevant slightly later for electronics and mechanical crafting.

The mistake that causes Valley IV progress to stall

Most players refine all Amethyst into Fiber or Components because they look broadly useful. Then the game suddenly requires Amethyst Parts for industrial explosives or repairs.

At that point, you may have:

• Active mining rigs
• Full depots of raw ore
• No Parts production line

This forces you to manually wait for the entire chain to run, creating long stretches of inactivity. Valley IV is designed to punish that oversight.

The correct Amethyst allocation strategy

As soon as Amethyst becomes available, split your processing output intentionally.

Amethyst output	Recommended allocation
Amethyst Fiber	40%
Amethyst Parts	40%
Amethyst Components	20%

This balance ensures you always have Parts ready for quests while still building reserves for crafting and upgrades.

How to set up the ideal Amethyst production loop

1. Automate an Amethyst node near the Valley IV Hub.
2. Route the output directly into a Refining Unit producing Fiber.
3. Feed Fiber into a Fitting Unit producing Parts.
4. Send Parts into nearby storage to minimize transfer delay.

The core loop looks like this:

Mining Rig → Refining Unit (Fiber) → Fitting Unit (Parts) → Storage

You can add a secondary branch from the Refining Unit to a Shredding or Gearing Unit once demand grows.

Once established, this loop runs indefinitely while you explore or complete quests.

When Amethyst is first required in Arknights Endfield

Amethyst becomes mandatory earlier than many players expect. You will need it when you:

• Repair your first zipline tower
• Complete the industrial explosives quest
• Power the Valley Pass plateau
• Craft mid-tier devices and electronics
• Repair Valley IV structures

If your Parts line is not active before these moments, progress slows immediately.

What Amethyst and its derivatives are used for

#1 Industrial explosives

The largest early consumer of Amethyst Parts. These are required to clear blocked paths and complete several story objectives.

#2 Structural repairs

Zipline towers and environmental devices rely on Amethyst derivatives.

#3 Gear and electronics crafting

Mid-tier components often require Amethyst Components, making early stockpiling valuable.

#4 Long-term AIC production

Many later recipes quietly depend on Amethyst outputs. Early automation prevents future shortages.

Farming tips that save the most time

• Automate the Hub bed first
• Avoid over-converting into Components early
• Let your factory run while questing
• Expand to Quarry beds only when demand spikes
• Keep storage close to processing units

Why Amethyst is the first real factory skill check

Amethyst Ore is the first resource in Arknights: Endfield that rewards planning more than grinding. Set up an automated Ore → Fiber → Parts loop as soon as Valley IV opens, and you eliminate the region’s biggest slowdown before it happens.

Before Valley IV, manual crafting works fine. Amethyst is where the game expects you to:

• Understand production chains
• Plan resource flow
• Automate efficiently
• Anticipate quest requirements

Treating Amethyst like an early-game ore leads to frustration. Treating it like a production backbone makes Valley IV smooth and flexible.

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We hope this Amethyst ore guide for Arknights: Endfield offered all the clarity you were looking for and made your experience smoother. If you have any feedback, suggestions, or questions, drop them in the comments below. We actively read and respond, so feel free to reach out whenever you need extra help or guidance.