Opal
If I have a girl, she will be named OPAL. It's unusual, easy to spell, well known. There is this awful soap opera character named Opal that I keep hearing about. Opal sounds like a FUN girl who can kick anyone's butt.
Opal is a translucent gemstone. It came to be used as a name in the 19th century along with other gemstone and nature names, like Pearl, Ruby and Crystal.