NEW Sterling silver?Triangle minimalistic post earrings

Truly unique NEW Movie minimalistic post earrings. Not sure if they are sterling. I bought these at a boutique made by a local designer. For some reason, I remember being told they are sterling but I cannot find any markings. There is a little mark on one of the earrings, please see last picture. Not noticeable when on. Paid $44. Thanks for l@@king & Enjoy✨