Answer:
I make a living following the wealthy and beautiful.
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 has many teeth but can't bite?
A single syllable do I claim black was my most famous name; Fetal to mortals here below thousands have I slain in a single blow.
I am the noblest musical instrument
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.