Well, i got 8 golden and 2 obsidian after only a couple hours of multiplaying with my husband.
They are picked up together with crafting materials, and are also stored in the gifting inventory when you use “transfer materials”.
Open your inventory and click on “gifting” right by the “sort items” button. Check if there’s any resonance there.}
Edit: you can also press G in-game and type “resonance”. There’s a more detailed explanation there (from where I just learned what I typed above about where they’re stashed, lol)
What level were you guys? We were both starting new chars and thus playing from level 1. I am now wondering if they have implemented it based on experience gain together rather than time played together. Which would be incredibly stupid, but at least explain why I have zero.
We played from level 1, but I think the first resonance ever dropped was in monoliths.
Also, it’s stated in the in-game guide that level doesn’t matter but progress towards getting resonance is based on proximity, close to the distance for sharing XP.