I just bought 130g shilajit resin and it will take a very long time for me to finish it.

Please prevent it from water and dirt contamination. Use a clean and dry shilajit spoon or similar mini spatula to take a portion in order to prevent contamination. It will last forever even if not used if stored properly. No need to keep it in the refrigerator. Usually 130g is for 9 to 11 months of supply for an adult.