Ganz Glass Light Up Angel Of The Month - December. This beautiful clear as crystal glass light up angel holds a colored heart in her hands that represents the birth stone for each month. The color for December is Blue. There is an on/off switch on the bottom. Requires 3 button batteries that are included. Item No. EL4290 Comes gift boxed. Size: 2.5 inches diameter, 3.5 inches high.