The Moonstone, Wilkie Collins

The Moonstone, a large, beautiful yet fated diamond, was stolen from an Indian shrine. It was given to Rachel Verinder on her eighteenth birthday and, that same night, stolen again.

Sergeant Cuff is employed by Rachel's mother to find the precious stone and has no shortage of suspects. By turns, those on the periphery and at the heart of the mystery tell their version of events until all is unravelled at the unexpected conclusion.