In a blender jar add the grapes and pomegranate pearls and churn till pulpy. Sieve the mixture to extract the juice.
Add the juice to a large jar; add sugar syrup, black salt, black pepper and jeera powder. Stir well. Add this to 4 medium glasses.
Add some ice cubes to each glass. Top up with soda water. Garnish with chopped grapes and pomegranate pearls. Serve chilled.