1992 D penny, raised " spear tip" on obverse

What would you call this raise elongated area underneath Liberty at the shoulder?

 

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plate bubble

 

I do not think it is a plate bubble. It looks like a damaged die to me.

 

My be a lamination? strange for sure? Does it have some kind of coating on this cent ?

 

No laminations on zincons

 

Looks like something was on die while striking. Metal/copper? top of copper by rim.
Planchet flaws also could be reason.

 

If it was on the die at striking, the anomaly would be incuse on the coin. This is raised. Now is could be that the die was damaged from something being on the die during previous strikes or perhaps a clash.

 

Clash yes can't rule that out .photo Looks like it on top but could just be photo angle?

 

None that I can tell.

 

1990 D lincoln cent error (lamination) on both sides with a crack this is on ebay now ??

 

http://www.ebay.com/itm/1990-D-linc...329?pt=LH_DefaultDomain_0&hash=item3aa3fa22f9 is post mint damage.

 

There are also coins from the 2000's, on eBay, that are listed as RPMs. Just because it's on eBay doesn't make it so. Laminations occur as a result of an impurity in the alloy mixture. Post 1982 Lincolns are zinc with a thin copper plating. No alloy present.

 

It appears to be a plating bubble that has ruptured. Add a little moisture and in no time you'll have a good case of zinc rot.