The good crystals for me were the Solari, the Upari, the uber-Personal crystal, the Kaiburr, and the Ankarres Sapphire. The colors I use are Violet, Blue, and I'd use Cyan except I have a bug on my X-Box game. If I try to use it in my lightsaber, when I save my game and reload it the blade is showing, but it's not activated. Is this a result of having a used game or something? Can anyone help me with this? I've tried everything including using cleaning wipes.