A real acorn cap, copper electroformed with an artisan-made lampworked glass acorn.
This one is an aqua-Caribbean blue with the outside dappled with a sky blue color that reminds me of verdigris. It looks quite different when light penetrates it vs when it's against a background. Check all the photos to see how this chameleon changes.
Each of the acorns are hung from hand-patinaed rustic knobby circles, accented with a bead, and strung on plain copper chains, about 32" long.