Niigata Chert (Niigata Prefecture) [Famous Stones of Japan]

NIGATA Chert

Niigata Chart

These fossils are radiolarians and sponges deposited on the seafloor.
If you look at the cross section with a magnifying glass, you may be able to see fragments of the fossil.
It can only be formed when there are no other minerals mixed in with the seabed, and because certain environmental conditions must be met, there are only a limited number of places where it can be found.
Niigata chert is a Triassic deposit.
The stone itself is very hard and layered, so when it breaks it becomes sharp.
It is colorful and transmits light, so it looks very beautiful.

This fossil was formed when radiolarians and sponges were deposited on the seafloor. When you look at a cross section with a loupe, you can sometimes see fragments of the fossils. They can only be formed when there are no other minerals mixed in with the seafloor, and because certain environmental conditions must be met, they can only be found in limited areas. Niigata chert is a deposit from the Triassic period. The stone itself is very hard and layered, so it becomes sharp when we break it. It is colorful and light can be transmitted, making it very beautiful to look at.