Sometimes they can come out greenish. So long as it is a solid-seed (not immature) I am sure it will germinate under the proper conditions. If you feel comfortable enough doing this, take the seed between your thumb and forefinger and roll it
gently. You could try this with some bag seed if you happen to have any laying around. If the seed crumbles it wasn't any good in the first place, if you feel it staying solid then chances are it is in good condition.
I would take a picture of me doing this to show, but I am kind of worried about the government being able to use my fingerprints from it to track me down.
(Hey, where's the 'paranoid' smiley?)
Anyways, here is my Rocklock at a few days shy of three weeks:
As you can imagine, I haven't been able to smoke it yet.