Board Thread:Naruto Discussions/@comment-45444155-20200608233611/@comment-6769189-20200614024148

What do you mean no explanation for the Gold dust? That was explained as Magnet release.

Gaara was made a Jinchuriki while in the womb. My theory is that exposure to Bijuu chakra(especially pre-birth) passes on some of the Bijuu's physical traits onto a person. Naruto and all his kids were born with whiskers. This would explain Gaara's dark eyes.