第 7 集: Shoko 在探索海玻璃與 Ruri 一起研究二氧化矽色彩科學時結交了朋友。

7

Schoolgirl Shoko loves rocks, but receives no support until she encounters Ruri and company investigating sea glass. We learn different ways for silica glass to gain colors, including by thin-film interference. A day of searching for old bottles on the beach gains Shoko new friends with a shared interest. Ruri learns that her name is an old word for blue glass. (Source: Wikipedia)