Answer:
Used on a diamond and left on a board. It's great for a gymnast his grip to restore. What is it?
I have a hundred legs, but cannot stand. I have a long neck, but no head. I cannot see. I'm neat and tidy as can be.
I'm a god. I'm a planet. I measure heat.
To unravel me you need a simple key, no key that was made by locksmith's hand. But a key that only I will understand.
What has a spot and is very bright, is sometimes, red, white, blue, yellow or green and is often blinding.
What covers its face with its hands, speaks no language, yet most known what it's saying?