Line a baking sheet with parchment paper.
Separate clementines into slices, removing any of the white stringy pieces.
In a small bowl, melt the chocolate chips in the microwave for about 1-2 minutes. Stir until smooth and creamy.
One at a time, dip each of the clementines into the melted chocolate until approximately one third of the slice is covered. Place on the parchment paper and sprinkle with some chopped pistachios until the chocolate portion is lightly covered. Continue until all of the slices have been completed.
Place the parchment lined baking sheet in the fridge until the chocolate has fully hardened, approximately 10-15 minutes.
Eat immediately, or store in a covered container in the fridge to prevent the clementines from drying out.