graphite help needed

[thunderbt3]

Whats up guys,
I recieved a parts lot off ebay and i think some of the parts are graphite, how can i tell the diffrence between graphite and regular parts?
i wish AE did what losi did and stamped graphite on all their graphite stuff.

parts are for a ntc3 by the way

thanks

[losifreak24]

if you look at the pieces close and it looks like a bunch of fibers pressed together it's probably graphite, also if you drill or sand it the dust from graphite will be grey or white, plastic will be black