Place 1/2 cup of the pomegranate juice into a medium mixing bowl and sprinkle the gelatin on top. Set aside. Place the remaining juice and the sugar into a small saucepan and place over high heat. Bring just to a boil. Remove from the heat and add to the juice and gelatin mixture, stirring to combine. Place the bowl into the refrigerator and chill, just until the mixture begins to set up, approximately 30 to 40 minutes. Remove from the refrigerator and stir in the seeds. Place into a 2 cup mold of your choice or 4 1/2 cup individual molds and chill until set.