@Irishman27,
lets start with something easy. Take a piece of broken glass (like a bottle top) EAR SOME WORK GLOVES!!. Lightly scratch the rock bck nd forth about 10 times and see if it makes a small furrow or not. If it is scratched by quartz, its probably a serpentinite or an ophiolite chunk thats been stream rounded. If its as hard as quartz , its a green form of quartz either prasiolite or aventurine (We have other tests for those)