Answer:
makeup for finger tips
I am pronounced as one letter, written with three. I come in blue, black, brown, or grey. Reverse me and I read the same either way. What am I?
I can go through glass without breaking it. What am I?
I must be broken before you can use me. What am I?
I am essential to life on earth! I am split into thirds. Two thirds are the same. One of the thirds is 8. The other two are 1 each.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.