石せき筆ひつ

noun

slate pencil

A pencil made of slate or similar soft stone, historically used for writing on slate boards. Now mostly a historical or nostalgic item.

• 昔むかしの学がっ校こうでは、石せき筆ひつで石せき板ばんに字じを書かいた。

  In old schools, they wrote on slate boards with slate pencils.