Someone griefed my clan.

[Joshthemister]

Someone griefed the storage area of my clan and somehow destroyed the chests?

[Th3Element05]

If the chests were unlocked and only secured through the precious stones prevent-use flag, then the person who destroyed the chests was someone allowed in the field.  Show a staff member where the grief is when you see one online, and please don't repair the grief until a staff has had a chance to look over the damage, as that makes it much harder for us to see what happened.

[Joshthemister]

I had originally put an emerald block over the chests and only allowed access to players who were in my clan (they could only use their chest, no one else's).

[bknysnake]

So your griefer is a clan member.

[SuperNova_2]

All taken care of. The griefer was banned:P