In the anime, the Talismans were three mythical items sought by the Death Busters, as well as Sailor Uranus and Sailor Neptune. Said to be sealed within the Pure Heart Crystals of individuals, the Talismans could trigger the appearance of the Holy Grail when brought together.
The Talismans were eventually found to be the Space Sword (sealed inside Sailor Uranus' Pure Heart), the Deep Aqua Mirror (sealed inside Sailor Neptune's Pure Heart), and the Garnet Orb (already owned by Sailor Pluto).
In the English dub, the Talismans were called the Crystal Treasures.
In the manga, the Talismans were already in the possession of Sailor Uranus, Sailor Neptune, and Sailor Pluto. When brought together, the Talismans would summon Sailor Saturn, who would bring destruction in her wake.