There are many, many people in the world. Some of them are unusual, just like some of the stones on a beach are unusual. The unusual stones can help us to understand the unusual people who are autistic. You can see clear through it - nothing is hidden.
Some autistic people hide nothing, revealing themselves completely to anyone who cares to see.
Nothing can be seen about it at all. Some autistic people hide everything, and remain a mystery to everyone. The bright chrome finish is very striking. It says just one thing about the stone, but in a way that captures our attention. Some autistic people have one special interest, or one special ability, which captures our attention the same way.