Macy Gray’s unmistakable rasp, unshakable grasp on soul, and funky spirit has ensured her status as a 21st century icon. Ruby canvases a wide spectrum for the songstress. Raucous horns that feel ripped from a classic seventies flick augment the grit on “Cold World” as “Jealousy” spins a covetous narrative that soars as it seduces. Gary Clark Jr. adds six-string firepower to “Buddha.” In the end, Ruby represents Macy Gray at her most passionate, poetic, and powerful.