Radiant Ore is one of the trickier materials to access in Slime Rancher 2, and it'll require you to venture a little further out of the way in order to harvest it. Still, since it's one of the components needed to craft the jetpack, I'd say it's well worth it, especially as this will let you explore even more areas and procure rarer slime friends...
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How to get Radiant Ore in Slime Rancher 2
Source: PC Gamer (opens in a new tab)