Can Anyone Identify This Stonelike item?

[JeanneCurt]

Good Morning All!

My cousin who died in Korea at 20 in 1951 found this item when he was young.  It is like stone, 4" long and weighs about 5 ounces.  I am not sure if it some sort of coral or a fossil.  Thanks in advance for any information!
Jeanne

[wendy177]

I have absolutely no expertise in this area but it looks like a really big tooth to me.

[mart]

The second pic shows a line looks like between the part that was exposed and what was covered in the jaw !! Looks like a possible tooth but if so,, would have been a filter feeder  !!  Doesn`t look similar to those that catch their own food !!  That would be my guess but I am no expert on salt water creatures !!

[KC]

Where did he find it?  The US? 

[cogar]

It might be a fossilized part of a root or tuber of a plant.

[sapphire]

Possibly a tusk? Would a tooth have those striations?

[fancypants]

I'd give the item the identity of a fossilized barnacle , one that had died under(sea)water & had other small creatures burrowing into it , post mortem .... they too met the same fate as of their former home !

Cool little item , JeanneCurt !

[cogar]

Read description @ ...........

http://www.geologicalwonders.com/productinfo_v3.aspx?productid=STIGMARIA-ROOT-3

[ANCIENTONE]

Horn coral:  http://www.uky.edu/KGS/fossils/didifind.htm

[fancypants]

I'll mark myself among those who stand corrected , ANCIENTONE ... !

It does seem to be a fossilized horn coral !