Silver earrings with turquoise colored stone

These are simple yet stylish and very nice. I doubt they are sterling as I could not find a mark for it, probably stainless or some type Of metal. The center stone is turquoise in color but not sure what it is. These were probably hand made. Like new condition, perfect for gift giving - make great small gift or stocking stuffer. Light weight, little smaller than a dime. I tried to take good photos.