This marble is very cool in hand, lots of colors blending together. Red, White, Blue, Yellow, Etc.. The signature looks like a crayfish with the numbers 196 below it. AI says it’s a Jody Fine Marble but I’m not 100% sure this is correct her marbles seem to be clear in base designs, this is more solid colors like a traditional lamp work design. It measures 1-5/32 inches and is very unique looking. If you know the markings let me know please. Any other questions please feel free to ask.