The endearing enigma collection known as 'Jewel Mysteries' recounts the tale of Richard Ranashinha de Vulpian – a charismatic jewelry evaluator, and Seigi Nakata – a jovial university attendee who, in collaboration, uncover the covert messages enmeshed within precious gems. By scrutinizing the psychological facets of the stones' possessors, they crack a variety of cases related to jewels.