I’m light as a feather, yet the strongest person can’t hold me a whole day. What am I

One of me saves nine, I hear, Another comes with thread and sticks, And yet another with big ears Has designation Six-Two-Six You may see me on clothing, art, And even flesh I've traveled, But rest assured, should I depart, It all will come unraveled

Do not look at me I bind metal with an arc Making many, one

I'm considered a stone from heaven, and can even be imperial, a green treasure. Artists love carving me, and mothers name their daughters after me.

A concrete pit with water clear, A fabric field with sixteen spheres, A jackpot waiting to be won, A masked marvel with swords and guns, A descriptor of the eyes, What single word between us binds?