I agree about the pics - no more distracting reflections! In a double ingot, you will usually be able to see a continuous false "seam" all the way around the circumference of the marble - it's actually the interface between the two globs of glass (marbles) that came together to form it. Imagine how you could take two different colored balls of clay, push them together and round them into a larger ball - you should be able to follow that interface between the two colors all the way around that large ball. Also, if yours is a double ingot it would have been made from two considerably smaller marbles.