The Orange-Yellow Diamond

"The Orange-Yellow Diamond" by J. S. Fletcher is a murder mystery that sees a poor young writer accused of murder. When a pawnbroker in London is discovered to have once owned a rare South African diamond, a gem that's now gone missing, detective Melky Rubenstein is on the case. Not only does he aim to retrieve this precious stone, but to also prove the innocence of a man falsely accused and find the true culprit.