Iridescence

I'm called Amber on a daily basis.
By night, I am "ma'am" or "HEY WAITRESS!"
At home I'm "Am" or "Sissy".
Even in Spanish, I'm Luna.
All of these put a name to my face,
But no one really knows ME.
My name is Iridescence,
I change color with every angle you look at me.
I am a rainbow-like play of color,
Caused by different refractions of light.
I have a lustrous quality.
I am me. But nobody notices.

A.H.