Antarctica has the color of glaciar and sky, a pristine light blue with shiny facets in its blue almost denim light opal stones that seems to fuse to the mellow sterling mildly oxidized with an almost matte surface. 
Cast in Tufa stone as old traditional Native American silver work, each piece is unique and even when have asymmetry they are cohesive and "belong" to each other with their talismanic symbolic forms. Post earrings, have pressure nuts on the back to secure them -the curly style- and I added the silicone tips that could work as extra security or even as replacement for the curled small nuts. 
Really beautiful pieces on hand.
For measurements, the pictures where the earrings rest on the bust show their real size since it is a human size mannequin, some of the other pictures include a standard size business card, a USA quarter coin and a ruler to allow you to have as much idea of their real size as I possibly can provide. 
If you need some metric measurement just let me know.