The Case Files of Jeweler Richard, 宝石商人理查德的谜鉴定, 宝石商人理查德的鉴定簿, 寶石商人理查德的謎鑑定, 寶石商人理查德的鑑定簿, 보석상 리처드 씨의 수수께끼 감정
The story follows Richard Ranasinghe de Vulpian, a handsome British jewelry appraiser, and Seigi Nakata, a bright and upright Japanese college student. The duo solves various jewel-related cases by unraveling the hidden psychological aspects of their owners that lie within the gems.