1964 Quarter - Die Crack / Cud?

Sorry for the bad pics - best my equip can do - Yes, it is very much raised - Kind of looks like a extra piece of silver

That would be an interior die break, it might garner a small premium but an error collector would most likely be seeking an example with a much larger break. It is worth noting though that interior breaks are fairly uncommon.

Granted, the pictures are not the best but I base my findings on the two distinct points at either end of the "worm" seen best in the second picture. Those points should each have a die crack trailing away from the main break. I use the term "interior" to separate it from the other type of die break- the "exterior break" more commonly known as a Cud.

Die cracks will usually form at inherent points of weakness on a die, i.e. an area of the design subject to repeatable cracks across multiple dies. For Washington quarters, those areas would typically be the base of the bust and along the leading edges of the eagle wings. An interior break starts as a thin crack and then expands in width. Since interior breaks are so uncommon, I have to assume that it needs more than just regular wear and tear on a die to develop. It could be caused by a flaw in the die steel or an improper annealing of the die during the hubbing process.