Can you buy a yellow kyber crystal?

Excuse me, I was wondering if I could get some clarification on a matter regarding kyber crystals. Specifically, I've been interested in acquiring a yellow kyber crystal. I understand that kyber crystals are highly sought-after, both for their unique properties and their connection to the Force in the Star Wars universe. However, I'm not entirely sure if it's even possible to buy a yellow kyber crystal, or if they even exist in real-life applications or just within the fictional Star Wars lore. Could you please enlighten me on this matter? Is it feasible to purchase a yellow kyber crystal, and if so, where might I be able to find one?