Boil up sugar and vinegar. Add spices and simmer for about 10 minutes. Sort the blackberries, add to the syrup and continue to simmer in a closed saucepan for about 5 minutes.
Fill blackberries into clean, hot rinsed, tightly sealed glasses. Pour the brew over the blackberries. Close the glasses, let them cool down, put them in a cool place and let them steep for at least 1 week.