How do Jedi get 2 Kyber crystals?

I'm curious, how exactly do Jedi acquire two Kyber crystals? I understand that Kyber crystals are powerful, rare, and deeply connected to the Force, but I'm unsure of the specific process or rituals involved in obtaining them. Could you elaborate on the steps that a Jedi would take to attain these two crystals, and perhaps even discuss the significance they hold within Jedi culture and lore?