Tokuyama Kurojin Stone (Yamaguchi Prefecture) [Famous Stones of Japan]

KUROKAMI Stone

Tokuyama Kurogami Stone

Kurokami Island has been called "Kurokami Island" since ancient times, and has a history of being an area that humans could not approach, so there are almost no records remaining about the island's interior.
It is a rare island that is adjacent to Senjima Island and is connected to it by sand on the coast due to the close distance.
Yamaguchi Prefecture is famous as the prefecture that has produced the most prime ministers, and the granite from Kurokami Island became famous when it was used in the construction of Japan's National Diet Building.
It is a stone known for its durability, luster, and stability, as it contains little iron and therefore does not change color.

Kurokami Island has been called "Kurogami Island" since ancient times, and historic it was considered an area where humans could not approach, with almost no records remaining about the island's interior part. Building. It is a Japan stone known for its "stable" nature, as it is durable, lustrous, and has little iron content so will not change color.

Origin Yamaguchi Prefecture
meaning Stability, career advancement, protection
Mineral Classification oxide minerals
chemical composition Si₂, Al₂O₃, K₂O, Na₂O, CaO, Na₂O
Crystalline Monoclinic
cleavage none
Mohs hardness 7
gloss Glass gloss
color Black, white, blue, gray
specific gravity 2.7
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