Hematite Rough Crystal.
Hematite, a natural form of iron, is a strongly grounding and protective gemstone. With it's beautiful dark shine, this stone is ace at absorbing negative energy and reducing stress in times of worry, something we could all certainly make use of.
It's also good for working with the Root Chakra, which will help you transform negative energy into positive vibration.
These crystals are approximately 30mm - 50mm per stone.