Housekishou Richard-shi no Nazo Kantei (The Case Files of Jeweler Richard)

Housekishou Richard-shi no Nazo Kantei (宝石商リチャード氏の謎鑑定), also known as The Case Files of Jeweler Richard is an anime series based on the light novel of the same name written by Nanako Tsujimura and illustrated by Utako Yukihiro.