The fifth tiara was described by Munn as "A pearl and diamond tiara composed of 12 Buton and 13 pear-shaped Pearls, with Diamond chain to form necklace". Later, Munn says that the tiara was given to Queen Victoria by the Aga Khan and that Queen Victoria gave it to the Duchess of Connaught.
Why Munn is suggesting that Queen Victoria had only these 5 tiaras when the inventory was compiled in 1896 is a bit of a mystery (especially as most had already been given to others), as we know she still had her small sun ray tiara, her sapphire tiara, the Oriental circle, Queen Adelaide's fringe, the Regal Circlet and the Diamond Diadem.