Crystal Magic. You know the Dancing Lights cantrip. You can cast Charm Person once with this trait and regain the ability to do so when you finish a long rest. Charisma is your spellcasting ability for this spell.
As a crystal qhralli, you have incorporated translucent minerals into your body, granting you a brilliant appearance. You are able to distill the magical properties of these gems. Crystal qhralli adventurers tend to rely on their charm.