Silver.
silver
The Rosetta Stone in The 39 Clues book series is a clue that leads to various historical secrets and mysteries. It is a vital piece in the quest of the Cahill family to uncover the truth behind their heritage and accomplish their ultimate goal. The Rosetta Stone ultimately serves as a key to unlocking important information that helps the Cahills win the race against other rival teams.
Silver.
In Mission 8 of The 39 Clues series, the clue is "Sword." It leads to the discovery of Gideon Cahill's sword hidden in the Ekat stronghold in Japan.
The turtle believed that the clues were leading them to a hidden treasure or a mysterious secret that would be revealed through each clue they found. They interpreted the clues as a path to a valuable discovery or adventure.
In the "39 Clues" book series, Nikola Tesla hides his clue on his own deathbed by encoding it in a lullaby that he sings softly to the main characters. The clue is revealed when the characters decipher the hidden message in the lyrics of the song.
only 39 clues... hence no 41st clue
The X-Ray clue. Hidden in Hope Cahill's arm is a micro chip. It uncovers Honey.
Online, the second clue in the 39 clues is hydrogen. But in the second book of the 39 clues is tungsten
The first clue book gave hints such as "begin it where warm waters halt," "put in below the home of Brown," and "heavy loads and water high." These clues are believed to be part of the puzzle to uncover a hidden treasure chest.
The clue is iron salute in book 1 of The 39 Clues.
there is no page clue in 39 clues book 9