Smoky Quartz is a stone of spiritual protection and purification; cleansing one's energy field of negative influences and attachments. It creates a resonant shield of spiritual Light around the body. Additionally, it acts as a barrier against lower energies, psychic attack, geopathic stress, and unhealthy environments.
The crystal pictured is the one you receive 
154.3g
67.7mm x 47.7mm x 29.8mm
All measurements are approximate