Solarium Ore

Tier 6 hot planets reached after obtaining a Cooling EPP; explore underground cave layers for Solarium Ore deposits.

Before you go

Check the recipe or upgrade that calls for Solarium Stars so you know how much ore to seek.
Equip the Cooling EPP and verify the chosen planet is within your available progression before beaming down.
Locate a cave or create a safe descent, keeping an exit route and enough blocks to cross hazards.
Search underground for Solarium Ore veins and mine them with your tool.
Return to the ship when inventory fills or combat and environmental damage make the trip unsafe.
Smelt the ore at a suitable furnace to produce Solarium Stars.
Use the Stars in the required late-game recipe and store any excess in a labeled container.

A Tier 6 threat rating signals stronger enemies as well as access to the final crafting ore; bring suitable combat gear.
Do not put Solarium Stars into the Refinery: they cannot be converted there.

Mining is repeatable across planets with finite deposits on each world. Visit another suitable Tier 6 planet when you need more ore.

Landing without a Cooling EPP; heat protection is required for the planet hazard.
Expecting the Refinery to accept Solarium Stars; reserve them for crafting.
Mining without a planned use and filling storage with late-tier material; let the recipe determine your target.

Stop when the Stars cover the current recipe or upgrade. Return to this farm only when another specific crafting requirement calls for Solarium.

Sources & fact checks

Open a guide to find other locations and see what the item is used for.

Economy and settlement

Solarium is the final crafting ore tier and supports late-game equipment and upgrades.