What I want to do
Per Jeff's repeated suggestion, I zapped the two dilutions of Grand Isle Tar Balls in mineral oil with a green lazer.
These samples were prepared with the help of Courtney Kearney.
My attempt and results
real quick, here are pictures. the x100 dilution still looks green.
x10 dilution looks a different color, though.
Questions and next steps
It attenuates the laser, yes?