Puzzling Trapezohedron

Description
The puzzling trapezohedron is a curiously shaped object that fits in your palm and reflects an array of scintillating colors as you rotate it. When attuned, it orbits your head and grants the following effects:
 * Requires attunement to someone not wearing any headgear.
 * You may turn the Trapezohedron invisible and visible again at will.
 * You gain a +2 bonus to insight checks, and are immune to effects that read your thoughts.
 * You may cast the Detect Thoughts spell once until your next long rest.