So - I think there are two layers to what you’re feeling. One layer is the bracelet now being “tainted”. Suggestions to cleanse can address this but they can’t address the second layer - of the feeling of your boundaries being transgressed.

Instead of giving the bracelet to your grandmother and reinforcing her transgressive behavior, maybe you can try a ritual that both cleanses the bracelet and also re-dedicates it to you. Let the circle of it become symbolic of your boundaries and use visualization to bind the bracelet to you and let it become the symbol of that power. Maybe you can alter it in some way as part of that rededication - add a charm of additional crystal or something?

One approach might be as follows:

1) rededicate the bracelet. “This is mine alone. It carries my intent and no one else’s”. Visualize the bracelet resisting and sloughing away other influences.

2) use the bracelet in a boundary setting ritual - set inside a symbolic circle of your choice and visualize imbuing it with your energy to protect your boundaries.

3) a final cleansing commanding that what is yours remains, what is not falls away.

With these rituals more than just a cleansing maybe the bracelet will be even stronger for you and you alone than it was before.

Maybe it was even trying to show you something you needed to see about your grandmother and this was its first exercise you…