OH, and the reason It's not the actual gold dice themselves is that I feel they'd vanish mysteriously the moment I took them out to play a board game.
Most boardgames require lots of people, so you might not know everyone, and one of my favorite things is going to board game bars and playing after a busy week.
The necklace would allow you to discreetly rub it for luck while playing, while the dice would probably vanish if you played with them XP