For the apricot jam, smash the apricot seeds with a hammer, tie the white seeds in a muslin cloth. Scald the apricots hot and peel and pit them.
Put apricots and sugar in a pot (at least 7 liters pot) and let stand for half a day. Then slowly boil the apricots, add the sachet with the seeds.
After four minutes of boiling time, fish out the seed bag and stir in the vinegar, make a jelly test and fill into clean jars with twist-off lids.