3/$30 green energy donut necklace unsure if jade, quartz or something else

I am unsure if this is real jade, quartz or something else, so please use the photos as part of the description long beaded necklace with donut. Beads feel synthetic. The donut feels colder than the beads, but the donut also warms up in my hands. inside of the donut has some peeling (as shown)