Does anyone know that speed was made in the 90s, rocks like that were also relatively dry and similar to koca Not sure of your question, but I found that different solvent pulls of the freebase meth would gas out different looking product. xylene and tolual would result in a white fluffy product. If not recrystalized, it was like powder sugar. the better it was, the more it glittered and ha defined crystals . you are asking about amphetamine and I am not sure this is anything to dowith your question