I cant harvest crystal in the fame inside caves, i dont know why, but no matter how much i hit the crystal with my pick, there is no update in my inventory.
The only crystal i found was as a rare drop mining iron.
Without the crystal i cant finish the sorcery journey.
Like @DeaconElie said you cannot harvest crystals with tools anymore from Crystal nodes. From Crystal nodes you gain crystals only by picking them up one by one ir use the harvesting spell of sorcery. Every cave with sorcery will give you thousands of crystals in moments. So get corrupted and enjoy the only good reason this spell exists.