pomegranate juice (or enough to fill 1 ice cube tray)
Pour pomegranate juice into ice cube tray. Freeze until solid, 2-4 hours.
In a blender combine lime juice, liquor, 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 glasses and rim with salt.
Place a pomegranate cube in the bottom of each glass. Pour margarita mixture in and enjoy.