Singing Quartz crystals make a "singing" tone when gently tapped on. Each one has its own unique sound. 

Smoky Quartz 

• Chakras: Root
• Elements: Earth
• Numerical Vibration: 2 & 4
• Zodiac: Capricorn & Sagittarius 
• Keywords * Grounding * Stability * Organization * Transmutation * Practicality * Manifestation of Dreams & Inspirations * Cleansing * Protection of Light * 
• Smoky Quartz comes in 2 variations, natural and irradiated. Natural Smoky Quartz holds the transparency of Clear Quartz with an overall tint of various shades of brown. Irradiated Smoky Quartz is usually black or clear that fades to black. It is made by treating clear or natural Smoky Quartz with x-rays, gamma rays, and/or radium and poses no radiation hazards to anyone in contact with it.  
• Smoky Quartz is a go to stone for grounding and connection to the physical body. It helps those who are too flighty and stuck in the mind, come down to find stability. It has all the properties of Clear Quartz making it a powerful ally for those seeking to ground spiritual information into the physical realm. It creates a protective shield around the light frequency codes that Quartz holds and helps expand the physical body to be able to hold and anchor those same light codes. This allows a pathway to unfold for manifestation, and practical application of spiritual knowledge. It helps one structure and organize goals with patience and clarity of thought. Smoky Quartz has cleansing abilities that can clear spaces, auras and chakras from energetic debris, negative attachments, and blockages. It transmutes energies by connecting one to the energy circuit of Earth to utilize its transformative, cyclical power. It can be used to counteract the negative effects of radiation, including exposure to electromagnetic fields. Irradiated Smoky Quartz tends to feel more amplified and charged with high frequency due to its exposure to X and gamma rays. It is especially good at absorbing energy, making it a good companion for someone who is detoxing.