went thru my pocket change and think i found some errors

[the one and only]

went thru my pocket change and think i found some errors but i would like some verification if possible. here are the photo;s

is this a lamination error?or something else? two discolored areas. are to take a photo of it. its a dime.





possible double die? this is a 2007 nickel.



i really like this quarter. i know for a fact this is an error but not sure what to call it. i dont think i would call it a die crack because the metal raised. goes from front of neck to the ititals on the back of neck.

also on the back of quarter it looks like the bird has a feather coming from its head. looks like a die crack but it may be a scratch? i cant tell.



penny. broadstrike?



last but not least....an off center? maybe? its not much but i let you all be the judge.




should i keep them all or spend them

[diamond]

I don't see anything wrong with the dime, although the areas you circled are prone to develop blind-ended die cracks. The nickel appears to show a pattern of die deformation. The quarter shows a blind-ended die crack. The defect above the bird's head is probably a die gouge or a die dent. The 2007 cent appears normal. It's not unusual to show a bit of "slide" just inside the rim. The 1997 cent shows a minor misalignment of the obverse die. You can spend them if you want, since there is no premium attached to any of these defects.

[the one and only]

what is a blind-ended die crack? i have never heard that term before?

[diamond]

It's not an "official" term. It just refers to a die crack that begins and ends in the middle of the coin, i.e. there's no connection to the rim at either end.

[3˘nicker]

i see nothing on your nickel
(mad) mis aligned die's happen to lincolns pretty often. one side would be a little off but the other would be center. it's when both side are equally off center say 5% or more is when they become more fun.
i do have a guess on your dime, it could be stuck through grease. i can't tell in your pic but that is something common in that area for modern dimes, no premium
you 1/4 you say you wouldn't call it a die crack because of raised metal. that is exactly what that is. the crack was in the die making a crevas, that is why the metal is raised on the quarter.