Pour pomegranate juice into ice cube tray. Freeze until solid, about 2 hours. Pop cubes from tray. In a blender combine lime juice, liqueur, and tequila. Turn blender to the highest speed and gradually drop in all but 2 juice cubes, whirling until slushy. Wet the top of serving glass and rim with salt. Place a pomegranate cube in the bottom of each glass. Pour margarita mixture in and enjoy.

Source: California Pomegranates