This rock is made of alunite.

From a crystallography perspective, this peridot has very interesting characteristics.

Vermiculite, in mineralogy, is a type of mineral and is used for various purposes due to its characteristics.

This rock contains chlorite.

Sudoite is a green mineral that is mainly found in Japan.

This beautiful prehnite is part of my mineral collection.

This stone building is an ancient ruin.

According to Japanese mythology, Sesshōseki was formed after the death of the fox goddess Tamamo-no-Mae.

Mr. Ishiguro is my best friend.

The foundation stone of this building was laid 100 years ago.