Key necklace is often given on her 18th birthday, it signifies the opening of doors.
18th Birthday sterling silver necklace with three charms:
A silver heart charm for love and friendship.
A freshwater pearl symbolising wisdom through experience.
And a key charm:
Giving a key charm as an 18th birthday necklace is a long held tradition, the symbolism is that it represents opening of doors to a successful career and new possibilities for a happier future.