While visiting the Summer Court, Feyre briefly saw the necklace in Tarquin's trove.
After Feyre stole half of the Book of Breathings from the Summer Court, Tarquin sent three blood rubies to the Court of Nightmares, declaring that they were enemies of his court. After hearing news of this, Varian sends Amren a necklace of diamonds and rubies to soften the declaration of the blood feud. The necklace was placed beside her bed, as if she fell asleep looking at it.
- A Court of Mist and Fury (First appearance)