1. In a bowl mix the strawberries, raspberries, blackberries, blueberries and liqueur together.
2. Refrigerate for approximately 20 minutes.
3. In another bowl combine the mascarpone cheese, cream, sugar and vanilla.
4. Beat, using an electric mixer, at high speed.
5. Refrigerate 30 minutes.
6. Layer 6 parfait glasses, alternate berries and cheese mixture (ending with the cheese mixture).
7. Top with grated or shaved chocolate pieces.