Necklace with Pearl and Clear Stone Sterling Clasp

Picked up some jewelry. This is a long necklace. Some kind of pearl and clear stone. Strung on string, not pastis string. Lobster claw clasp is sterling. Anyone know what the clear stones are?

 

Probably rock crystal, i.e. clear quartz chips. That's what they usually are.

 

Thanks Evelyb.

 

Just to pile on, freshwater pearls & quartz chips.

 

Thritto.

 

Thanks Bronwen and Any!