, also known as Introduction to Mineralogy, is a Japanese manga series written and illustrated by . The story features high school student Ruri, a girl who loves minerals and jewelry who meets graduate student Nagi, fostering an interest in mineralogy. It has been serialized in Enterbrain's manga magazine Harta since August 2019, with its chapters collected into eight volumes as of September 2026. An anime television series adaptation produced by Studio Bind aired from July to September 2025.
Plot Ruri Tanigawa is a high school student who likes jewelry and accessories. When visiting a jewelry store, she found accessories that used crystals. Ruri was amazed by the beauty of the crystal, and tried to find it herself. One day, while searching for crystals, Ruri meets Nagi Arato, a beautiful college graduate student studying mineralogy. Their encounter deepens Ruri's love and fascination with the world of mineralogy, as they are joined by Nagi's colleague Yōko Imari, and Ruri's classmate and best friend, Shōko Seto.
The characters look for minerals such as quartz, garnet, pyrite, gold and fluorite, and use various mineralogy tools such as a panning dish, a hammer and topographic maps, but eventually come across rarer and more precious minerals such as platinum and gemstones such as sapphire.
Characters
A rambunctious high school girl whose admiration for gems leads her to take an interest in mineralogy. She's particularly fond of sapphires.
A wise young woman and college graduate student who Ruri meets and befriends during her first expedition. She is very dependable and highly knowledgeable about rocks and minerals.
Nagi's underclassman and best friend, with a penchant for historical research. She tends to struggle somewhat with outdoor work, but is still knowledgeable and willing to help the others out at any turn.
Ruri's classmate, who's held a fascination with rocks since a young age, which is revitalized after befriending Ruri and co.
Ruri's laid-back best friend.
Media Manga Written and illustrated by , Ruri Rocks began serialization in Enterbrain's Harta magazine on August 10, 2019. The first volume was released on October 15, 2020. As of September 2026, eight volumes have been released.
Volumes
Anime An anime television series adaptation was announced on September 11, 2024. It is produced by Studio Bind and directed by Shingo Fujii, with series composition handled by Michiko Yokote, characters designed by Mayu Fujii, and music composed by and . The series aired from July 6 to September 28, 2025, on AT-X and other networks. The opening theme song is , performed by Rei Yasuda, while the ending theme song is , performed by . Crunchyroll is streaming the series. Plus Media Networks Asia has licensed the series in Southeast Asia and broadcasts it on Aniplus Asia.
Episodes
References
External links