2-3"
Random pull 
Your piece will be (if not the exact picture) quite similar!
 
Some also call Garnierite the Accumulation Stone. Thanks to its alleged radiant energy, the stone can help people tap into their abilities to create and manifest new outcomes. It also has the potential to bring people closer to their desires, giving them the power to make their aspirations a reality!
 
Please see our Crystal Lore Section for more info on this amazing stone!