All of my grand stones disappeared (30≈40 red and 20≈30 blue)
And 50 3rdtier red and all 3rd tier blue, I hope the mods can help me with this as this is my 3rd day playing this game and this hurt me bad, and I'm certain that I didn't accidentally sell it to vendors

Check if you stored them in your Camp.

or clicked the auto-enhance button when upgrading your gear