Dean Davidson Reign necklace

Gold pendant necklace Purchased at Nordstrom The chain measures 32 inches end to end. I’m not sure exactly what stone this is. It is light blue in color and the tone changes slightly depending on how the light hits it. There are a couple of imperfections from the necklace swinging forward and hitting a desk/table but I don’t think they are noticeable when wearing. Offers welcome!