Ruri no Houseki Episode 10 - One Sentence no Haisenro

Other Names: Ruri no Houseki, Introduction to Mineralogy, 瑠璃の宝石, Ruri Rocks

Episodes: 13 / 13

Genre: Slice of Life, CGDCT, Educational, Seinen

Type: TV

Show Info: Ruri no Houseki

Episode 10 Plot: The geologists set out for a historical manganese mine, with Yoko hesitantly in the lead, after Nagi has to miss out due to a last-minute excursion. We learn some properties and uses of manganese. Blocked by a collapsed rail tunnel, the team searches for fallen samples along the tracks. They discover rhodonite and rhodochrosite in quantity, suggesting prohibited use of potentially toxic tailings as track ballast. Perhaps a long-ago rail crew used their cargo for emergency repairs, though the actual answer remains unknown.