Marquis test, Purple to black with some yellow

[sa1816]

Yo guys! just tested out my beans and maquis definitely went purple to black, but has some yellow outline. Could this be some methylone mixed in?

 

[Transform]

The marquis reagent is naturally yellowish without anything added to it, can you test a sample with no drug in it?

 

[uncle_bud]

yellowish? hmmm, i woulnd't say yellowish. When it's fresh it's transparent. WIth time it goes kind od brownish, don't you think? good thinking to put a drop picture without anything on here. Judging by the color reaction, it's impossible to determine with certainty if the sample consist of multiple substances.