Black Diamond

Melissa Kinelly's normal life shatters when her brother comes home with a diamond ear stud that transforms him from normal college student to raging human volcano constantly threatening a violent eruption. After the private investigator she hires to research the diamond's history is murdered, she takes on the investigation herself, with the reluctant help of the manager of the pawnshop where her brother bought the gem. Pitting herself against a group of monstrous creatures connected to the diamond, she grapples with its dark history to find a way to stop it before it destroys her and everything she holds dear.