Ruri Rocks
Ja kanji瑠璃の宝石
Ja romajiRuri no Hōseki
Genre
Ruri Rocks
manga
AuthorKeiichirō Shibuya
PublisherEnterbrain
MagazineHarta
ImprintHarta Comix
FirstAugust 10, 2019
Volumes7
Ruri Rocks
tv series
DirectorShingo Fujii
WriterMichiko Yokote
Music
StudioStudio Bind
Licensee
NetworkAT-X, Tokyo MX, BS11, TVA, ABC TV
FirstJuly 6, 2025
LastSeptember 28, 2025
Episodes13

Ruri Rocks (瑠璃の宝石, Ruri no Hōseki, lit. 'Ruri's Jewels'), also known as Introduction to Mineralogy, is a Japanese manga series written and illustrated by Keiichirō Shibuya. 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 seinen manga magazine Harta since August 2019, with its chapters collected into seven tankōbon volumes as of September 2025. 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.[3]

Characters

Ruri Tanigawa (谷川 瑠璃, Tanigawa Ruri)
[4]
A rambunctious high school girl whose admiration for gems leads her to take an interest in mineralogy. She's particularly fond of sapphires.
Nagi Arato (荒砥 凪, Arato Nagi)
[4]
A graduate college student who Ruri meets and befriends during her first expedition. She is very dependable and highly knowledgeable about rocks and minerals.
Yōko Imari (伊万里 曜子, Imari Yōko)
[5]
Nagi's underclassman with a penchant for historical research. She tends to struggle somewhat with outdoor work.
Shōko Seto (瀬戸 硝子, Seto Shōko)
[5]
Ruri's classmate, who's held a fascination with rocks since a young age, which is revitalized after befriending Ruri and co.
Aoi Kasamaru (笠丸 葵, Kasamaru Aoi)
[5]
Ruri's laid-back best friend.

Media

Manga

Written and illustrated by Keiichirō Shibuya, Ruri Rocks began serialization in Enterbrain's Harta magazine on August 10, 2019.[6] The first tankōbon volume was released on October 15, 2020.[1] As of September 2025, seven volumes have been released.[7]

Anime

An anime television series adaptation was announced on September 11, 2024.[8] 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 Daisuke Achiwa and Kazuki Yanagawa.[4] The series aired from July 6 to September 28, 2025, on AT-X and other networks. The opening theme song is "Hikari no Sumika" (光のすみか, lit. 'Home of Light'), performed by Rei Yasuda, while the ending theme song is "Sapphire" (サファイア), performed by Hana Hope.[9] Crunchyroll is streaming the series.[10] Plus Media Networks Asia has licensed the series in Southeast Asia and broadcasts it on Aniplus Asia.[11]

References

  1. ^ "ja:水晶、砂金、ガーネット…鉱物採集は現代の宝探し！渋谷圭一郎「瑠璃の宝石」1巻" (in Japanese). Comic Natalie. Natasha, Inc. October 15, 2020. Retrieved September 11, 2024.
  2. ^ Dempsey, Liam (May 29, 2025). "Ruri Rocks Anime Reveals Theme Songs, Premiere Date in New Trailer". Crunchyroll News. Retrieved September 20, 2025.
  3. ^ "ja:瑠璃の宝石" (in Japanese). KadoComi. Kadokawa Corporation. October 15, 2020. Retrieved September 17, 2025.
  4. ^ Pineda, Rafael Antonio (September 16, 2024). "Introduction to Mineralogy Anime's Teaser Reveals Cast, Staff". Anime News Network. Retrieved September 16, 2024.
  5. ^ Hodgkins, Crystalyn (March 20, 2025). "Introduction to Mineralogy TV Anime Reveals More Cast in Promo Video". Anime News Network. Retrieved March 20, 2025.
  6. ^ "ja:入江亜季、九井諒子らが描き下ろし！ハルタ付録に“おおきいすてきポストカード”" (in Japanese). Comic Natalie. Natasha, Inc. August 10, 2019. Retrieved September 11, 2024.
  7. ^ "ja:【9月12日付】本日発売の単行本リスト" (in Japanese). Comic Natalie. Natasha, Inc. September 12, 2025. Retrieved September 12, 2025.
  8. ^ "ja:漫画『瑠璃の宝石』2025年テレビアニメ化決定 続報は16日に発表" (in Japanese). Oricon. September 11, 2024. Retrieved September 11, 2024.
  9. ^ Cayanan, Joanna (May 29, 2025). "Introduction to Mineralogy Anime's New Video Unveils More Staff, Theme Songs, July 6 Debut". Anime News Network. Retrieved May 29, 2025.
  10. ^ Mateo, Alex (June 18, 2025). "Crunchyroll Announces Release Schedule for Summer 2025 Season". Anime News Network. Retrieved June 18, 2025.
  11. ^ Pineda, Rafael Antonio (June 25, 2025). "Aniplus Asia Airs Simulcast of Ruri Rocks Anime". Anime News Network. Retrieved June 25, 2025.