Help identifying a relic found in Jamestown

[Miacanefinfan]

I found this diamond shaped relic made out of metal (Unknown type of metal) with my metal detector. A house possibly existed in the area I found this item but I have no clue what it is. It was fully encrusted with hardened sand that turned into rock. It took me forever to clean it into its current state. Any ideas of what it might be?

 

[trdking]

could be a plow tooth

 

[kermit]

If it wasn't so thick I would say it's shaped like a tobacco blade used for cutting tobacco, but they are lighter and thinner. My next best guess would be a small part of a large reaper or sickle blade, but it still looks a little heavy even for that.