The Sapphire Crown only glows for a member of the Royal Bloodline.

Created for a Daily Challenge. I used a LoRA to help get an ornate sapphire crown, and then used Prompt to Edit to make those sapphires really glow with magical energy. The original prompt called for the wearer of the crown to be a beautiful Cambodian princess. I also used the word "sorceress" -- my current assumption is that magical talent runs in this fantasy realm's royal family, and the crown is enchanted to only light up for someone who has that talent, and who is directly descended from their first Sorcerer King. He probably enchanted it himself, to ensure his lineage would have a vivid symbol of their authority after he was long gone.

(Lots of fantasy novels have used similar premises -- and occasionally such a magical item proves it can work as the rough equivalent of a DNA test, by demonstrating that a certain person can't use it properly because that person, despite what everyone thought, is not actually the biological descendant of a previous monarch. Oops!)