Opal Necklace

The Opal necklace is a cursed Dark object, which was claimed to have taken the lives of nineteen Muggles. It was used by Draco Malfoy in a failed attempt to assassinate Albus Dumbledore, that ended up hurting Katie Bell.

1992
When Harry Potter mistakenly went to Borgin and Burkes instead of Diagon Alley, he saw the necklace and read the label, "Cursed."

1996-1997
In 1996, four years later, the necklace was purchased at Borgin and Burkes by Draco Malfoy, under the orders of Lord Voldemort. During the first Hogsmeade trip of the 1996–1997 school year, Draco Malfoy cast an Imperius Curse on Madam Rosmerta. She in turn cast another Imperius Curse on student Katie Bell. Bell was ordered to take a package containing the opal necklace to Albus Dumbledore

.

Harry Potter, Ronald Weasley, and Hermione Granger witnessed Bell arguing with her friend, Leanne, as they were heading back to Hogwarts. They noted that Katie did not seem 'herself,' acting dazed and detached. During the course of the argument, the package ripped, and the necklace touched Katie's skin through a hole in her glove. Katie rose gracefully into the air, screaming, with Leanne screaming as well and attempting to pull her down. Ron and Hermione attempted to help while Harry ran off to find someone, bumping into Hagrid and leading him back to the group. After learning the nature of the event, Hagrid carried Katie to the castle, accompanied by Harry and his two friends, who handed over the necklace to Professor Severus Snape, through the Caretaker Argus Filch. Katie was taken to St Mungo's Hospital for Magical Maladies and Injuries, where she spent much of that year recovering from the effects of the curse.

Appearances

 * Harry Potter and the Chamber of Secrets
 * Harry Potter and the Half-Blood Prince
 * Harry Potter and the Half-Blood Prince (film)

Notes and references
Collier d'opale