Helpp! On what type my cat is!!?

I've been looking all over the internet today, and I really wanna know what type of cat I have. She is three years old she is still around the size of a kitten except a little bigger! She's soild black, with patch of hair on her chest. Just a little bit of it!! Not a tuxedo cat!! She has huge beautiful amber/green/golden eyes! HELP! My family and I have been wondering bout this for YEARS!