Sapphire Tianshan Stone (Saga Prefecture) [Famous Japanese Stone]

Sapphire TENZAN Stone

Sapphire Tianshan Stone

Granite containing sapphire (corundum).
The surface is made of sapphire glass using cerium oxide, which is used to polish stone.
This cerium oxide is said to have the effect of strengthening the stone, making it hard, water-resistant, and resistant to discoloration.
Granite that is resistant to such weathering is rare, and the vitrified surface reflects light like a mirror.

This is granite containing sapphire (corundum). The surface has been turned into sapphire glass by cerium oxide, which is used when polishing stone. This cerium oxide is said to have the effect of strengthening the stone, making it hard, water-resistant, and resistant to discoloration. Granite with such weather-resistant properties is rare, and the vitrified surface reflects light like a mirror.