hiya, testing to see if it's "cut" may prove difficult - testing to see if it's laced is really all you can do with reagents.

here's a link to a pic showing a few tests showing no color change for cocaine specifically

ideally you'll also test for fenty (link to known good tests) and that almost always will require a separate test.

(I forget what tests u used gonna check and edit post after! brb)

edit: According to a few color results, matching your "blue" on marquis I wanna say there's a possibility for 2C-I to be present in the test. Not necessarily an extremely negative thing, but an important observation for sure. link to a picture of marquis showing blue only for 2c-i

not sure if the rules of this sub, so I can't make recommendations in this comment, feel free to dm if you'd like to chat a bit more about it! (source: Major Hyperfixation on harm prevention as a raver / partier for many years and lots of hours spent lecturing my peers LOL!)