Keepsake (noun)

1. An object kept as a memento or reminder of a person, event, or place.
2. A trinket or ornament kept as a reminder of a special occasion or person.

Origin:

From the phrase "to keep a sake", meaning to keep something for the sake of keeping it as a reminder.

Examples:

1. The locket was a keepsake from her grandmother.
2. I've kept all the ticket stubs as keepsakes from our trip.
3. The small figurine was a keepsake from her childhood.
4. The engagement ring was a keepsake from her husband.
5. The old photo album was a keepsake from her ancestors.