Yes, the scale of the image is lost on most fol...

Yes, the scale of the image is lost on most folks. However, I'd bet at least 30% of your viewing audience can visualize scale(L X W X H) in some manner. If your images (here) are 1 mm wide then we are seeing mostly clay and silt particles. The smallest sand particle is 0.075 millimeters in diameter. Silt and clay particles are smaller, repectively.
Any particle less than 0.075 mm would be a silt or a clay particle.....that is geology bible speak stuff for most American geology folks (maybe 1-5% of the populatation).

Yes you are right, your time is best spent racing ahead of the avalanch!!! I believe that there is quality world class science that is attainable in all of your images!
Much more important/amazing than the average joe's amusement,... although that is what pays the bills in most endeavors.