Smokey Quartz is a silicon dioxide crystal which protects against radiation and electromagnetic smog. This piece consists of light to dark grey crystals.
On the physical level it is said to be a great detoxifier. It regulates liquids within the body and aids assimilation of minerals as well.
On the psychological level it dissolves negativity coming from built up anger and resentment within oneself. It gently works in a grounding way, enhancing attentiveness to the moment and bringing emotional calmness.