Ok, according to our “Gemologist” here is the official response:
Lab created stones DO have the same properties, and would not fade. The only stones that would fade would be either Kunzite (which can fade under any light), and Pink Topaz. The pink topaz is just “coated” with a substance, and if you clean it, or take it to a jeweler and don’t tell them and they steam or ultrasonic it, the coating may come off.