How long does Star Anise keep? The jar or packet at either of my local stores is quite big.   How long does it stay effective, once opened?   Given Star Anise is quite hard, I'm thinking it may last a while.  But would I be better vacuum sealing half or 2/3?

[edited to correct grammar.  rmjf]
They should last a long while if properly stored in an airtight container in a dry place.