The Gathering Storm: Challenge Log

[BobbinT]

You need to gather items that's close to your level. It's not the gathering node level that matters, it's the item level itself.

So yeah, mining a lvl 1 crystal shards at lvl 50 nodes doesn't count if you have lvl 50 miner for example. Mining cobalt ore does count.

Oddly, whatever item level you mined on that gathering node does indeed count toward luminary achievements.