Excitation spectra collected at Cr3+ red emission show an intense excitation broad band at 460 nm confirming there is energy transfer, which is responsible for one order of magnitude increase in the intensity of the red emission compared to Y3Al5O12 (Ce,CrYAG) single crystal doped with Cr alone. Ce/Cr co-doped Y3Al5O12 exhibits enriched emission spectrum in the red region due to a nonradiative energy transfer from the Ce3+(2E) level to Cr3+(4T) level.