Vintage Sterling Silver Earrings with Golden Streaks

These have been with me since 1985! I never wear them so why not try to sell them? I have no idea what this stone is (if it is a stone) because these were a gift, but it’s beautifully veined with gold? I have no idea. All I know is that they were a birthday gift when I turned 15! The last pic shows a nick in one of them.