MapleStory Chaos: Profession Recipe Guide

 Proof?

If you look at the text box, I disassembled a level 40 ring and got 1 Level 70~90 Crystal, and I disassembled the same level 40 ring and got 3 40~60 Crystals.

And here's the ring I disassembled to confirm (compare names):

[spoiler=It's definitely level 40][/spoiler]