Ok so I’m reading Catalyst right now (the prequel book to Rogue One) and kyber crystals are part of the main storyline. Basically, the empire is trying get as many as they can and also unlock their secrets, obviously to power the Death Star laser as we saw in Rogue One.
But here’s my stuck point... I seem to remember a Clone Wars arc where Ahsoka and Yoda took some younglings to a certain planet so they could get their own kyber crystals and build their own lightsabers. In that episode, they couldn’t actually see the kyber crystals until a crystal essentially “called out” to them. So why is the Empire as well as Galen Erso, Krennic, all the scientists, etc. able to see the crystals?
Maybe I’m not remembering the story arc right?