Like everyone else, I've been frantically farming jewellery dust in the past two weeks. There has been some competition - people racing each other (I'm a little guilty of this, but my main doesn't have much stam, so...). Time and time again, I see these players bypassing metal nodes and only collecting the jewellery dust nodes.
The thing with this is, both share the same node spawns. If you pick up the Rubedite and stand there a couple of minutes, it may respawn as a jewellery node, or of course it may respawn as a Rubedite node. Okay, I get that people are farming dust to make gold, primarily, but if you pick up the metal nodes as well you get a lot of refinable metal that can generate Alloy. And if you do happen to be farming in a place at a quiet time, if you do another round you'll find jewellery nodes on some of the spawns. What's not to like?

Same goes for the Rune nodes, which can generate the Psijic Portals - though I know those aren't quite as lucrative as Jewellery dust. I've gotten a few Infused pieces and one Hakeijo so far, and I've found a lot of the portals.