This is the pendant that katniss everdeen have on in the game it was given to her before she got to the games.

The mocking jay pin is the circular gold token katniss wears during the games to represent district 12. Each tribute is allowed one to remind them of their friend and family in their home district.

Katniss's mockingjay pin, like the bird itself, symbolizes a creature with a spirit of its own. As hybrid creatures that have broken free of the control of the Capitol