Nothing like this picture- but this is the best I could find.
Red and gold, the colors of fire, when it is glass it’s golden stem forms a base for it to rest upon.
A powerful artifact that turns from a glass and gold cup like thing into a living flower made of flame. It likes Vivienne, doesn’t like the person who tried to steal it, and doesn’t mind the thorn hounds. You found it in the mound, and don’t know how to use it.