Maybe the name Sapphire probably won't fit. Its pretty though.
Selena
Shamrock
Shimmaree (Shiny!) Hehe! :)
Silent Mist
Gem
Silver Sky
Snicker Doodle
Goldy Locks
Snap Dragon
Gold Dust
Goddess
Star
Starburst
Starlight
Starbright
There are some names. I hope that helps out a little. :D