the white seeds are not fully matured seeds, a good way to tell if a seed is good enough for planting is that it is brown with spots or lines on it, and you can give them a gentle squeeze and they shouldnt pop, if it does then it wouldnt have made it anyways, bad seed... but in defense of a white immature seed, i had 1 out of my afgoo sack that i got from a clinic and i planted it...
this is her, she is only a month old.
so..... yea its worth a try just dont expect anything, it helps when nothing comes out.
yeah i would have to agree with astonr420. I kind of test seeds really harsh, I place one in between my fingers and try to snap. If the seed gives or crushes then its no good, if it survives the test then grow on!