This medium-sized marble measures about 2.5 inches and is inspired by a rainbow. I start by using long rods of different colored glass, which are then rolled up onto a solid mass of molten clear glass. Next, it is twisted into a spiral pattern and shaped with a mold into a marble.
Check out this video on YouTube of me making rainbow marbles:
https://youtu.be/Bn6nYw4nYVQ