Gigantic Vintage German? Marble Swirl? Onion Skin? Hand Made? Almost 2 Inches

You are bidding on very large vintage marble. It measures almost 2 inches wide (1 3/4 inches). There are lots of color. I really do not know much about marbles so please ask questions prior to purchasing. It reminds me of a cat's eye with an internal swirl. There is a lot of ribbons of color involved. There are no cracks or chips, minimal wear, I am selling in found condition.