Help!

We have this gorgeous vintage necklace and earring set.  The necklace is strung with hefty beads that are quite cool to the touch.  I am not sure if they are glass or if they are possibly quartz or another stone.  There are striations in the colors and these feel tumbled...they're not perfectly round or perfectly smooth.  Do you know what it's made of?  It is accented with tiny little gold-tone beads.

Thanks!