- A gift from her grandfather, King George V, to commemorate his Silver Jubilee in 1935.
- One made from graduated family pearls which the Queen had created with a diamond clasp soon after she acceded the throne in 1952.
- A gift for her coronation in 1953 from the Emir of Qatar, also with a diamond clasp.
Since these are seen essentially every day, I will refrain from linking each post individually here. Each event where one of the three strand pearl necklaces is spotted are tagged; click here for those posts.