Ruri no Houseki Episode 3

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Alternative Titles

Synonyms: Introduction to Mineralogy

Japanese: 瑠璃の宝石

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Information

Type: TV

Episodes: 13

Status: Finished Airing

Aired: Jul 6, 2025 to Sep 28, 2025

Premiered: Summer 2025

Broadcast: Sundays at 21:30 (JST)

Producers: Aniplex, Movic, AT-X, Tokyo MX, BS11, Egg Firm, FuRyu, Kadokawa, Bit grooove promotion

Licensors: None found, add some

Studios: Studio Bind

Source: Manga

Genre: Slice of Life

Themes: CGDCT, Educational

Demographic: Seinen

Duration: 23 min. per ep.

Rating: PG-13 - Teens 13 or older

Statistics

Score: 7.99¹ (scored by 26,186 users)

¹ indicates a weighted score.

Ranked: #725²

² based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.

Popularity: #2700

Members: 80,285

Favorites: 393

Available At

Official Site

@rurinohouseki

Resources

AniDB

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Streaming Platforms

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Aniplus Asia

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#3 - The Lost Planet

Nokosareta Hoshi (残された恒星)

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Duration: 00:23:40
Aired: Jul 20, 2025(JST)

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Synopsis

Nagi brings Ruri to her messy graduate lab at the university, where Ruri meets Nagi's colleague Yoko. Nagi has published a paper on the unusual pyrite crystal Ruri found and listed Ruri as a co-author. In tidying up the lab, Ruri finds an otherworldly-looking bismuth crystal. Nagi shows her how it was made. Ruri also finds an old topographic map, valuable because it shows a mine not depicted on newer maps. The three girls travel to investigate. A magnet helps identify iron ore in the tailing pile. Falling into a collapsed section of tunnel, they must traverse more tunnels to escape. Nagi's ultraviolet flashlight reveals a galaxy of fluorite crystals not previously recorded. Nagi encourages Yoko to lead a study on them.

(Source: Wikipedia)

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