Large Dark Silver Toned Hoop Earrings with Purple Stones

I am not sure, but these look vintage to me! They have a very 1990s grunge era feel to me. They are a dark silver metal gray in tone and feature three double sided purple stone cabochons. They are subtle, but have a pretty purple color when they hit the light right. These are wide around but skinny, measuring nearly 2" in diameter and about 1/8" at the widest points. They are in good condition. Not marked.