Ep. 6: Ruri and friends locate the sapphire deposit after correcting a note error near a shrine.
Aired on August 10, 2025
6
Ruri identifies the watershed containing the sapphire deposit, prompting a trip with Nagi and Yoko to the location. After visiting a shrine, their initial foot search proves difficult due to fallen leaves obscuring the ground. Ruri discovers an error in her notes, which they correct through additional sand searches to better pinpoint the deposit. Upon climbing to a ridgeline, they find plentiful sapphires, leading Nagi to explain their geological origin. An old inscription reveals a missed clue regarding the shrine's name. Additionally, Ruri is shown wearing more suitable clothing and shoes for outdoor work, though this detail is not explicitly mentioned in the narrative.
Episodes
- Ep. 2 · Ruri Prospects for Gold and Discovers the Difference Between Cash and Scientific Value
- Ep. 3 · Nagi and Ruri explore a university lab and discover a mysterious bismuth crystal alongside an old map.
- Ep. 4 · Ruri uses magnetism to accelerate sapphire source analysis while Yoko studies fluorites.
- Ep. 5 · Ruri, Yoko, and Nagi explore a gravel beach for rocks and minerals.
- Ep. 6 · Ruri and friends locate the sapphire deposit after correcting a note error near a shrine.
- Ep. 7 · Shoko finds friends while exploring sea glass and silica color science with Ruri.
- Ep. 8 · Shoko and Ruri investigate water quality and discover orange crystals at an abandoned factory.
- Ep. 9 · Team discovers opals at dam after investigating riverbank waste and quartz sources
- Ep. 10 · Geologists explore abandoned manganese mine and discover toxic rhodonite ballast