Yup! those are the nodes out of the Silverwoods! Both decorative and functional!! Your charger can reach 8 blocks away, so, in theory, you could place a 17x17 (x8 deep) bed of pure nodes under your charger. Normal nodes will not bully these. Complex nodes are common so the Compound Recharge Focus is a must here.
All you need is a Manasteel Grafter and your first Silverwood and you have an unlimited number of nodes to harvest, and now place, BWAHAHAHAHAHAHA!
There was a time, early in the pack when you could collect (and reset) any node you found with a cardboard box. That was a broken and easily exploited "Feature" that has been fixed. Moving these pure nodes does not reset them, they come out of the box exactly as they went in. You can't utilize (AFAIK) them for bullying, and this is just a cool way to do something different. SO, IMHO, not broken.