Arilyn's Cranberry-Raspberry Jello Mold

1 lg. pkg. raspberry Jello
1 can (11 oz.) crushed pineapple
1 1/2 c. boiling water
Marshmallows or nuts (optional)
1 can (2 cups) cranberry jelly

Dissolve Jello in water, add cranberry jelly and stir until blended (will be somewhat lumpy). Add pineapple and pour into mold. When semi-set, add a layer of marshmallows and/or nuts, if desired.