Tuesday's Rubies (Rockhounds #1)
C.B. Potts

He and Sean have been a good team, making money and garnering academic acclaim all over the world. The one thing Matt can’t seem to do is get Sean to see him as anything but a means to an end, in their dealings with stones, or in their personal life. When Matt meets Parker, the big bodyguard they hire to help them navigate the countryside, he sees just what he’s been missing. But will Sean get them all killed in the meantime?