Sibylline
I was thinking something related to saturn too...so something heavy, dark colored maybe black, cold so lead or metal, pot.
And with ace cups yes a chalice makes sense or a mug, or a trophy even like you already said.
Something sentimental with the ace cups so something that would mean something.
Aha! A mug. I could totally see that. I also feel like it would be something sentimental given that it's a gift from the heart, so to speak.