Jawaban:

The power of the sun drop did not go to a stone. Instead, Mother Gothel, the main antagonist of the story, discovered that when Rapunzel's hair was cut, it lost its magical properties. The power of the sun drop resided in Rapunzel's hair and remained with her until it was cut. The stone you mentioned might be referring to the magical flower that contained the sun drop's power, which was used by Rapunzel's mother, Queen Arianna, during her pregnancy, leading to Rapunzel's birth with the sun drop's power.