The dead jeweler, Ten Mohs' street name comes from the hardness rating of diamonds. Mohs is the mineral hardness scale, 1 being talc and 10 being diamonds.
David Ogden Stiers (who plays Maura's adoptive father) played the character Major Charles Emerson Winchester III on M*A*S*H, a doctor from Boston, MA. Rizzoli & Isles takes place in Boston, MA.