Smoky quartz is a crystal that is said to have many healing properties, including physicalties, including physical, emotional, and metaphysical benefits. 
Physical benefits 
Pain relief: Smoky quartz can help reduce chronic pain and tension headaches
Fluid regulation: It can help regulate fluids in the body
Electromagnetic protection: It can protect against harmful electromagnetic radiation
Emotional benefits
Stress relief: Smoky quartz can help relieve stress, anxiety, anger, and fear 
Depression relief: It can help lift depression and replace it with positive thoughts 
Emotional balance: It can help promote emotional balance and harmony 
Metaphysical benefits 
Intuition: It can help bolster intuition
Protection: It can help protect against negative energies
Chakra balancing: It can help balance chakras, especially the root chakra
Smoky quartz is also said to help with personal growth and transformation. It can help you release negative energies and replace them with positive vibes.