Sado Red Stone (Niigata Prefecture) [Famous Japanese Stones]
SADO AKADAMA
Sado Red Stone
Akadamaishi is one of the three most famous stones in Japan.
It is a mineral formed when a large amount of iron oxide is bonded to quartz under high temperature and pressure.
Since ancient times, the red color of red jade has been said to ward off evil spirits, and it has been considered an auspicious stone.
It was originally produced around Sugiike Pond, where the dragon god is enshrined, but since 1980 it has been protected and the amount in circulation has drastically decreased.
It is also a historic stone that is said to have been presented to Toyotomi Hideyoshi.
Akadama is one of the three most famous Japan stones. It is a mineral formed when large amounts of iron oxide are combined with quartz under high temperature and pressure. Since ancient times, it has been said that the red color of Akadama can wards off evil spirits, and it has been considered an auspicious stone. It was originally mined around Sugiike Pond, where the dragon god is enshrined, but since 1980, Akadama has been protected and the amount in circulation has drastically decreased, making it rare now. It is a famous stone that it has a history of being presented to Toyotomi Hideyoshi.
| Origin | Niigata Prefecture |
|---|---|
| meaning | vitality, mental strength, insight |
| Mineral Classification | oxide minerals |
| chemical composition | SiO₂ |
| Crystalline | trigonal system, hexagonal system |
| cleavage | none |
| Mohs hardness | 6.0–7.0 |
| gloss | Glass gloss |
| color | Red, brown, white, black, yellow, orange |
| specific gravity | 2.6 to 2.9 |


