You don't need a diamond detective to keep you from getting scammed at the jewelry counter. If you're a first-time diamond buyer, you've probably asked yourself how to know if a diamond is real ...

A racketeer's bookkeeper gets Diamond involved in a blackmail scheme against his boss, when he asks him to find a book and gives him only one hour to do so. An acquaintance of Diamond's is murdered.

Former burglar Octave "Oky" Durham and art detective Arthur Brand look at seven ... How can you tell if a movie diamond looks fake? And do thieves use any unusual gadgets to steal gems?

A man hires Diamond to investigate an outer space society which he suspects is out to bilk his rich uncle since they have talked him into leaving the society $100,000 in his will. A man convicted ...