I tried to get a significantly different view of the marble and still have it be blurry, but my cellphone wasn't having it. Couldn't trick it into not focusing.
Tried to trick it my moving the camera fast toward the marble. Got a clear marble with the background looking like a Star Trek warp drive scene.
Not steelie, not clearie, not cat's eye, not an eyeball, a touch out-of-round, not modern, not an agate, ....
*heading back up to see what other things to answer*
Google is telling me to try words such as "sunflower" and "mustard and relish".
But I'm going at this blind. Never heard of these as pelt names before 90 seconds ago.
The clue I was thinking I saw was what looks like fire inside ... on the bottom of the marble.
But only comes in peewee ... no that does not make it easy for me!
Hmmmm ....
*heads out to look for head-scratching emoticon*
Tricky one. My first thought was actually Jabo, but I could also see it being a vintage swirl from a company such as Cairo Novelty or even a messed up Peltier. Just not sure.