I thought this pick would turn out less blurry, but here is a pair with onyx spacers.
For the green skulls, I used tiny jade spacers, because I thought peridot would be a little too bright
Spacers are usually available in all colors and stone. Tiger eye could work with cream colored or white skulls and of course skulls in brown. I only used onyx, dyed coral, jade and shell bead spacers.
I used the red coral beads with the red skulls.
Pink and black always works.
I plan on picking up more white skulls and making some earrings using tiger eye or crazy agate.