ON Dantooine....Inside the Jedi Enclave Sublevels--> rescue Jorran....when you exit approach him at the scavenger camp but save it before you talk to him. After talking to him he will offer three jedi artifacts for 1000 bucks... Pay it and see what you get. You usually end up with one lightsaber lense fixture, one crappy emitter, and on color crystal. You can reload this exchange as many time as you want to recieve the color of crystal you want.... I was able to obtain cyan this being my first planet off of Telos....It is random but you can role the dice with decent odds.....I recieved rare crystal colors 3 out of 5 times... (w00t)