Shungite
Shungite (Non-crystalline carbonaceous mineraloid) · Mineral Specimen / Decorative Stone / Industrial Mineral
Crystal System
Amorphous (Non-crystalline); typically occurs in massive or globular forms
Mineral Group
Native Element (Carbon-based mineraloid)
Chemical Formula
C (Elemental Carbon, typically 30-98%) with Trace SiO2, Al2O3
Formation Process
Sedimentary/Metamorphic; likely formed from the metamorphosis of ancient Precambrian organic soot or algae fossils
About This Crystal
Opaque, deep black to silvery-black sphere with a sub-metallic to vitreous luster. Surface appears smooth and polished with minor surface pits or veins.
Physical Characteristics
Color: Jet black to charcoal grey; Streak: Black; Cleavage: None; Fracture: Conchoidal to splintery; Specific Gravity: 1.8 - 2.0; Non-fluorescent.
Optical Properties
Opaque; Refractive index: N/A (Opaque); Luster: Sub-metallic to vitreous; No pleochroism or birefringence.
Hardness & Durability
Origin Region
Karelia, Russia (Zazhoginsky mine); typically found in Precambrian sedimentary-volcanic rocks
Hardness & Durability
Mohs Hardness: 3.5 - 4.0; Brittle tenacity; Low wearability for jewelry due to softness and tendency to leave black residue.
Care & Maintenance
Clean with a soft damp cloth; avoid ultrasonic cleaners and harsh chemicals; store separately to prevent scratching from harder stones.
Rarity & Value
Common to Uncommon; Value is based on carbon content (Elite vs. Regular) and polish quality. Relatively inexpensive as decorative spheres.
Special Characteristics
Notable for its electrical conductivity due to high carbon content and the presence of fullerenes (C60, C70) in carbon clusters.
Lore & History
Historically used in Russia as a water purification agent since the time of Peter the Great. Tradition associates it with the Root Chakra and protection against EMF radiation.