I really needed an icon like this, because I'm forever talking about both of them, and there are times when the other images aren't very appropriate.
There are bits missing from my sigil, too, and I know that were my junior bondmate to have a sigil, it probably wouldn't be that, but that's how I choose to represent him, as Earth. My senior bondmate's sigil is Something Completely Different, but that says a little too much about him to share. So, a red circle it is.