Shungite
Shungite is a black, carbon-rich rock found mainly in the Karelia region of northwestern Russia. It ranges from dull carbon-bearing rock to a lustrous high-carbon variety and is notable for its very old Precambrian age.
_9.jpg?width=760)
Shungite properties at a glance
| Type | Carbonaceous Rocks |
|---|---|
| Mohs hardness | 3.5 |
| Luster | submetallic |
| Streak | Black |
| Fracture | Conchoidal to uneven |
| Specific gravity | 1.9 |
| Transparency | opaque |
| Common colors | Black, Dark gray |
| Rarity | uncommon |
Geology & background
Shungite formed from ancient organic-rich sediments that were buried, compacted, and metamorphosed, concentrating carbon into a black, lustrous rock.
Shungite has been used regionally in Russia for centuries, including as a pigment and at a historic spa established in the early eighteenth century. It later drew scientific attention for its unusual carbon chemistry.
How to identify Shungite
- Look for a black color, light weight for its size, and a dull to submetallic luster.
- Shungite can leave a black mark and feels lightweight compared with most ordinary rocks.
- Locality is a strong clue, as authentic shungite comes almost entirely from Russian Karelia.
Where Shungite is found
Shungite occurs almost exclusively in the Karelia region of northwestern Russia, where ancient carbon-rich sediments were preserved and concentrated.
How much is Shungite worth?
| Entry-level specimen | $5 |
|---|---|
| Typical collector specimen | $30 |
| Premium specimen | $150+ |
Value depends on carbon grade, luster, size, finish, and whether the piece is carved or polished.
Common uses
- Water filtration media
- Collector and decorative specimens
- Carved objects and ornaments
- Scientific study of carbon
- Pigment in earlier times
Interesting facts
- Shungite is roughly two billion years old, making it one of the oldest carbon-rich rocks on Earth.
- It is named after the village of Shunga in Russian Karelia, where it was first described.
- High-grade shungite can contain a very large proportion of carbon by weight.
- Researchers have reported natural fullerene-type carbon structures within some shungite.
Care & safety
Shungite is relatively soft and can chip, crumble, or leave black residue on surfaces.
Avoid inhaling dust. Do not cut, grind, or polish unknown specimens without eye protection and a proper respirator.
