Fans of the mineralogy-themed anime “Ruri Rocks” can now stream Episode 11, which premiered in Japan on September 14, 2025, with international streaming immediately following. The episode, titled “Le berceau des saphirs” (The Cradle of Sapphires), is available on Crunchyroll and focuses on protagonist Ruri’s continued exploration of sapphires and their origins.
Where to Watch “Ruri Rocks” Episode 11
“Ruri Rocks” Episode 11 can be streamed on Crunchyroll, which offers the series with English subtitles shortly after its Japanese broadcast. The episode became available on Sunday, September 14, 2025.
Synopsis of “Ruri Rocks”
“Ruri Rocks,” also known as “Introduction to Mineralogy” (Ruri no Hōseki), is an anime adaptation of Keiichirō Shibuya’s manga series. The story follows high school student Ruri Tanigawa, who develops a deep fascination with minerals and jewelry. Her journey into the world of mineralogy intensifies after she meets Nagi Arato, a graduate student specializing in the field. Together, they embark on adventures, discovering the beauty and scientific intricacies of the natural world. The anime series, produced by Studio Bind and directed by Shingo Fujii, premiered on July 6, 2025.
Recap of Episode 10 and Expectations for Episode 11
Episode 10 of “Ruri Rocks” presented a shift in dynamics, with Imari taking the lead on a manganese ore hunt while Nagi was unavailable. This proved to be a challenging experience, as Imari struggled with leadership and overlooked crucial details, leading to a humbling lesson for Ruri and Shoko that even mentors can face difficulties. The episode highlighted that scientific pursuits aren’t always about grand successes, but also about learning from dead ends and acknowledging what you don’t know.
Looking ahead to Episode 11, titled “Le berceau des saphirs,” Ruri is expected to resume her research into sapphires, delving deeper into their origins and the rocks they are found within. This episode promises a blend of science, history, and new discoveries, as Ruri continues to develop her understanding and appreciation for mineralogy. One Reddit user noted that Ruri discovers two rare sapphire sites mixed together, and another remarked on Ruri’s persistent pursuit of sapphires leading to an appreciation of the mudstone wall containing them. The narrative often blends youthful adventure with educational value, making each episode a journey of discovery for both the characters and the audience. The first season of “Ruri Rocks” is slated to have 13 episodes in total.
