What does Jasmin have in her dresser that she asks Kirsten to find for her?

Jasmin asks Kirsten to get something from a dresser drawer. Kirsten unwraps a shard of glass from a tangle of socks. It still has blood streaks on it. Jasmin tells Kirstin that Hannah gave it to her in the hospital, and she thinks Hannah is trying to remind her that she is guilty of their father's death.