Ep. 5: Ruri, Yoko, and Nagi explore a gravel beach for rocks and minerals.
Aired on August 3, 2025
Ruri, Yoko, and Nagi search a gravel beach, finding banded agates and other forms of quartz. Nagi speaks of rocks as fascinating clues to the formation and history of the world. A fleck of silvery metal proves anomalously dense in a simple test. It might be platinum, which is less rare in serpentinite from the Earth's mantle. Nagi provides a short review of volcanism and plate tectonics. In the mountains they find a big shiny block of serpentinite, and more platinum grains in a nearby stream.
Episodes
- Ep. 1 · Ruri seeks affordable quartz and learns geology with Nagi's help
- 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