#3? Do you mean the third from the right? Ooops ... when I described marbles as #2 and #3 above, I was counting from the left.
Well, on #3 from the right, I see why you would think of the "9" which is often described as desirable. However, the 9's of the the M. F. Christensen company, for example, come from the marble being hand-gathered and clipped in a way which created a tail which circled around the marble.
All the marbles in this photo are machine-made. No hand-gathering stage. So the little swirl is coincidental.
These are "cold rolls". Errors. From the glass cooling off to quickly for the marble to be completely rounded on the rollers.
The creases are "seams" or "cutlines", not "pontils". The term "pontil" is generally reserved for a marble which is hand-made or at least hand-gathered. Sometimes the seams are more pronounced. Some marbles smooth out more on the rollers than others.
These are machine-made. With the solid colors they're considered game marbles, and have been made by many many companies for many many years. If that is a pearlized finish I'm seeing on them, that just means they were made recently. No reproduction. Just something modern marble makers do to catch our eyes. I don't know what the method is for putting that finish on.