Smoky quartz is grounding, it stimulates stability and responsibility, and increases endurance. It releases and dispels negative energy.
This is an excellent stone for clearing energy in your personal environment.
In healing, smoky quartz works well with ADHD and depression. It improves focus and lifts moods.
This piece is a Shamanic tool and would be perfect for energy work. The yellow color is Citrine. This piece says that it is a truth teller and it looks as though it has been smoothed by water.