Talismans are a funny group of wondrous items since they are sort of a catchall for pins, amulets, brooches, stones, and many others. Definition of a talisman is an object that is thought to have magic powers and to bring good luck, so if you aren't sure what to call that strange new item the party found, just label it a talisman.
Bloodstone Talisman - One more in a long line of objects in D&D that wants a piece of someone's soul.
Talisman of the Feywild - This is a re-skin of a 2e Talisman of the Faerie. Why fog and cloud spells? I have no idea, but I liked the concept.
The Talisman of Sohrab - A magic item from the world of Talia, this item can grant you wishes, but only if you make friends with it first
The Scarab - If you've seen the movie The Mummy (Brendan Fraiser one, not the Tom Cruise abomination) then you'll already have a feel for this item. If you haven't then you need to go watch it right now!