Of course but theres a difference between crystal and white colors. Ive never come across white molly, seen purple, black and crystal see through. MDMA isnt powdery at all and most of the piperazine pills look like they have powdery white blotches in them. Cat say whats in those pills for sure by looking at them but can give u a sure indication as to what it isnt.
some of the best mdma i have ever had(we're talking back in 2001) was pure white powder, and some of the best pills i have ever had(white doves 2001-2002, white hearts 2002) were pure white. i also had some pure white mdma as rainbow this year, and it was fucking great, up there with the best crystal i have had. and yes, i have also had and seen clear, purple and blackish crystal too!
not buying a pill simply because it has white specks in it is just stupid. sure, that pill is not an md pill, but i have had some incredible white speckeled pills before!! not buying it because it tested negative to mdma sounds like a better way to go about things!
as sameria said, just cos you haven't seen it, doesn't mean it doesn't exist, or that it is not good!
but yeh, i have given up on pills altogether. it's either md powder/crystal, or i don't even bother!!