Found these while metal detecting the other day, I cant say I've ever found ones like these so any insight it appreciated. Found in Nova Scotia Canada.
Here's another link stating either Confederate Texas or Mississippi buckle. The link has a remark where a collector (Relicman), has given the buckle his blessing as being real.
The star buckle is a civilian buckle that may have been used by some militia units Texas or Mississippi, however it was too flimsy to be used on campaign. The rectangular buckle is a late 18th Century knee buckle, The other buckle looks like Victorian era sash buckle.