Smoky Quartz
Quartz var. Smoky Quartz · Semi-Precious Gemstone and Decorative Stone
Crystal System
Trigonal crystal system, cut and polished into a standard hexagonal prism pendant habit (crystal point)
Mineral Group
Silicate mineral group, specifically Tectosilicates
Chemical Formula
SiO2
Formation Process
Hydrothermal and pegmatitic formation, where natural irradiation from surrounding radioactive rocks causes color centers to form in clear quartz over long geological periods.
About This Crystal
A manufactured, highly polished hexagonal pendant carved from translucent to semi-transparent brownish-gray quartz. It features smooth, flat facet faces terminating in a sharp hexagonal pyramid point, mounted in a silver-toned metal bail cap.
Physical Characteristics
Body color ranges from translucent light brown to deep grayish-brown (smoky); streak is white; no cleavage; fracture is conchoidal; specific gravity is approximately 2.65; tenacity is brittle; exhibits strong piezoelectric and pyroelectric properties.
Optical Properties
Uniaxial positive optical character with a refractive index of 1.544 to 1.553, low birefringence of 0.009, and weak pleochroism in shades of brownish-yellow and brown.
Hardness & Durability
Origin Region
Globally distributed; major sources include Brazil, Madagascar, the United States (Colorado), and the Swiss Alps. Forms in igneous, metamorphic, and hydrothermal environments.
Hardness & Durability
Mohs hardness of 7, offering good durability for everyday jewelry wear, though it lacks cleavage and can break under sharp impacts.
Care & Maintenance
Safe to clean with warm soapy water and a soft brush; avoid harsh chemicals, ultrasonic cleaners, and prolonged direct sunlight which may cause the color to fade.
Rarity & Value
Very common mineral globally; faceted or carved commercial jewelry points like this are inexpensive and widely accessible, typically ranging from low to moderate cost.
Special Characteristics
Coloration is caused by natural or artificial irradiation activating aluminum impurities within the silica lattice, creating the signature smoky translucent appearance.
Lore & History
Historically used in ancient Scottish cultures for ceremonial jewelry and dress pins. In modern metaphysical practices, smoky quartz is traditionally associated with grounding, neutralizing negative energy, and protection, primarily linked to the root chakra.