Just did something in game that I’ve done heaps of times - converted some crystals. Noticed that I had more crystals left in the original pile than I expected. So I tried again using Calcite to Angelite:

Would think that I’d end up with 89 calcite in that process, but ended up with 95 as you see. So I’m guessing you can ‘overstack’ crystals beyond 99. Can anyone confirm? Is it the same for runes? And by how much can you ‘overstack’?

You can stack how many crystals you want but if you have >98 crystals it will always show 99.

If you look at the upper screenshot there’s a Qty:105 on the right side.

Ah. Ty - didn’t notice:)