[quote=@TheUnknowable]
[@Skyrte]Lots of Kyber crystals underground, though?
[/quote]

Probably lots of untapped veins of kyber deeper in the crust that conventional mining cant get to. A lot like, iirc, that base delta zero that happened to Mandalore in the EU, it revealed a huge new source of mandalorian iron. 

But like Alfhedil says, we got a while before that happens, and the Imperials are likely to scramble to get as much kyber as possible after its revealed. Going to be hard to snatch one for ourselves.