Some different colored Sci-Fi Crates. Which I'll be using for an upcoming game prototype.
Maybe they will be helpful to you as well.
You can use any icon you want for the crates Just replace the mesh of the boolean object, that cuts into the crate.
The ones I have here so far: - Blue Save Crate - Green Gem Crate - Orange Exploding Crate - White Info or Objective Crate
Oh and there is a Gem object to go with the green gem crate. Just turn on its Collection.
They are CC0 please use them in anything you want. Bless