What could this be? Stone, cut?

[Roselina]

Hi all! I came across this (rather weird) piece. Seller does not know what stones they are. What is your guess on stone and cut? Glass, paste, natural stone?

 

[nala]

I’m going to go with glass.

 

[GliderPoss]

Rock crystal?

 

[Roselina]

My guess was glass at first, but the setting is gold, so I thought maybe white zircon? I don‘t even know why I feel, I need to know... stone detective?

 

[LilAlex]

Mismatched sizes and really crude setting so nothing too spendy, imo