Season 1

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  8.2/1063 votes

  My First Mineral Hunt

  Season 1 Episode 1 - Aired 7/6/2025

  High school girl Ruri meets graduate student Nagi while collecting minerals in the mountains.

  Director: Shingo Fujii

  Writer: Michiko Yokote

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  8.9/1049 votes

  The Value of Golden Color

  Season 1 Episode 2 - Aired 7/13/2025

  Ruri is determined to find gold, but Nagi explains that it might not be as likely as she hopes.

  Director: Yasuhiko Akiyama

  Writer: Michiko Yokote

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  8.6/1042 votes

  The Lost Planet

  Season 1 Episode 3 - Aired 7/20/2025

  Ruri meets Nagi's colleague Imari, and the three embark on a journey to find a lost mine.

  Director: Akie Ishii

  Writer: Michiko Yokote

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  8.3/1033 votes

  Study of Sands

  Season 1 Episode 4 - Aired 7/27/2025

  In search of sapphire, Nagi teaches Ruri how to study sand, but Ruri prefers to hunt on a bigger scale.

  Director: Yurika Tsushima

  Writer: Michiko Yokote

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  8.4/1031 votes

  Worlds Seen and Unseen

  Season 1 Episode 5 - Aired 8/3/2025

  Ruri, Nagi, and Imari head to the beach in search of agate, and Ruri learns about the long lifecycle of rocks.

  Director: miton

  Writer: Naoto Taniuchi

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  8.2/1026 votes

  A Closer Look into the Blue

  Season 1 Episode 6 - Aired 8/10/2025

  Just as the group begins searching for sapphire on foot, Ruri uncovers a grave mistake that halts their plans.

  Director: Hironori Tanaka

  Writer: Miharu Hirami

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  8.7/1025 votes

  Seaside Recycling Studio

  Season 1 Episode 7 - Aired 8/17/2025

  Ruri finds sea glass on the beach and runs into her classmate Shoko, who has a secret passion for minerals.

  Director: Masaho Hori

  Writer: Shingo Fujii

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  8.4/1020 votes

  The Golden Elegy

  Season 1 Episode 8 - Aired 8/24/2025

  Ruri teams up with Shoko for a science project, which takes a turn when they discover a strange, orange rock.

  Director: Yasuhiko Akiyama, Tomio Yamauchi

  Writer: Miharu Hirami

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  8.9/1017 votes

  Time Capsule of 1.9 Million Tons

  Season 1 Episode 9 - Aired 8/31/2025

  Ruri and Nagi head out to hunt for opals but discover that the area has already been fully excavated.

  Director: miton

  Writer: Naoto Taniuchi

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  7.9/1012 votes

  Sentence to an Abandoned Railroad

  Season 1 Episode 10 - Aired 9/7/2025

  Imari leads a hunt for manganese ore, when the group encounters a mystery along abandoned railroad tracks.

  Director: Akie Ishii

  Writer: Michiko Yokote

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  N/A/100 votes

  The Sapphire Cradle

  Season 1 Episode 11 - Aired 9/14/2025

  When Ruri has trouble deciding on her future, she turns to her study of sapphire.

  Director: Yurika Tsushima

  Writer: Miharu Hirami