Hi!!
If we translate the last sentence, "Me pongo los aretes y la pulsera de mi abuela." we would end up with, "I wear my grandmother's earrings and bracelet."
Susana's grandmothers jewelry seems the most important, because, it was passed down from her grandmother, to her mother, to Susana, meaning that it must be very expensive and worthy to Susana's family.
Hope this helps, have a wonderful day/night! :)