I was thinking of a green aventurine that comes in many shades & forms or maybe epidote or prehnite? It could be peridot maybe? It’s really hard to tell from the picture & they are inside a container.
Hopefully, someone may have a better idea for you about what they are though. Do you remember where you got them from? They would know what they are or you could bring them to a crystal shop and ask someone that can see them in person.