More beautiful beads

Is there any indication of age from these beads please?
The clear round ones test as rock crystal which was a nice surprise. Been restrung so no idea if it's the original clasp. Mary contrary refuses to test the smaller faceted beads but as they are a mish mash of styles I'm presuming glass.
The carnelian beads are huge 15mm and very heavy. Some of them are quite rough cut as you can see.
Thanks for looking

 

I'd call those agate rather than carnelian/cornelian; the latter are generally a uniform color and translucent. Those spacers do look like glass. I'd bet the clasp is original to some of the spacers but not the bigger beads.