the dark ones are good the big dark ones if they are cracked even better germinate faster if u want to tell right off the bat throw them in a cup of water the dead ones will float make sure to take them out
I had 20-30 seeds i been savin for months. i placed them between wet paper towels on 5-1-07 with a very weak plant food mixed in the water. As of this am 12 have popped 1 with 3/4" root! the seeds were dark brown and medium sized.