A lot of slow, consistent change has been happening in my life which reminds me of the lunar cycle. Things change, life gets hard, and then it becomes the norm - this is a cycle that keeps repeating. I've also noticed it as a big trend in jewelry. Moon and the phases of the moon have been used as symbols in jewelry for centuries. The moon see as the female counterpart to the sun. It's also seen as a symbol of death and rebirth.
Phases of the Moon necklace and bracelet by Andrea Fohrman
Moonstone rings designed by Blackbird & the Snow
Luna Ring, Black Diamond & Gold Moon Phase necklace and Lunar Phase ring from Pamela Love
Stunning Monique Pean ring - Not sure if it's meant to look like a moon, but the fossilized walrus ivory does to me.
Phases od the moon earrings made by Army of Rokosz