Answer:
Marking mortal privation when firmly in place. An enduring summation inscribed in my face.
Squeeze me and I cry tears as red as my flesh but my heart is made of stone.
I am a red drum which sounds without being touched, and grows silent, when touched. What am I?
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.
I row quickly with four oars but never comes out from under my own roof.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.