In a saucepan, combine the cranberries, raspberry jam, cranberry juice and spices.
Over medium heat, bring to a simmer; reduce to medium low and simmer for about 20 minutes. As the cranberry sauce cooks, the berries will burst and the sauce will thicken. There's no need to mash the berries, and the sauce looks prettiest if you stop cooking it while there are still some whole berries.
Taste the sauce; if it's too tart, add 1/4 - 1/2 cup granulated sugar, stirring until dissolved. If you used unsweetened cranberry juice, then you will likely need to add sugar, but if you used a sweetened cranberry juice cocktail, then you can add less sugar.
Remove from the heat, and let cool slightly. Serve warm, or at room temperature.
Notes
Refrigerate leftover cranberry sauce in an airtight container for up to 1-2 weeks, or freeze the sauce for up to 3-6 months.
If you can't find seedless raspberry jam, simply press the jam with seeds through a mesh strainer to get all the jam through, then discard the seeds left behind in the strainer.
For a Cranberry Orange Sauce, substitute sweet orange marmalade for the raspberry jam, and orange juice for the cranberry juice. It's a delicious alternative to the raspberry.