leo

Blue Box:

- This box has at least two true statements.

- The Black Box has at least two true statements.

- The gems are in this box

White:

- Every statement on the blue box is false

- Every statement on the black box is true

- The gems re in this box

Black:

- This is a true statement

- This is true statement

- The gems are in this box

Answer: Blue

blue box: The letter 'B' appears twice on the box that contains the gems.

white box: All statements that contain more than one 'B' are true.

black box: The blue box contains the gems.

Spoiler: It's in the black box.

Again, room 46 is poisonous, watch out

I've got this one:

Blue box: The second statement on the black box is false.

The Black box contains the gems.

White: Every statement with the word "Blue" is false

Black: Both statements on the blue box are true.

The blue box contains the gems.

Answer: The gems are in the black box.

Tip: Do not enter room 46, it doesn't exist XD