Well those are pretty darn interesting, the gorget should elicit some comments from the Ohio collectors. Did they come from the Florida area?
The other piece looks like the conch shell adze. I've got a couple of Lucayan/Taino shell adzes from the Bahamas. Depending on the size, it's either queen conch or horse conch. They were the only Arawak peoples in the Caribbean that made really large shell adzes.