Marble and Tiger are different though. Marble is much flatter and the colours are not quite the same.
It is interesting to have this information, thanks to Raymond; and to Patrick for passing this on.

I can only think of one piece i have ever seen that is yellow with no bubbles - the "perfect nitrate". It's a Japanese Globe I have, with a button rim. (Can't find a pic right now and it's out of reach to take another.)