I am looking for a nice looking 1 mm cube to use in a video I want to make. I am looking for suggestions about possible sources. I don't really want to mess around with making one right now and I would prefer (at least now) practical effects to using a 3D animation program. So far I have only found 1 mm cubes in beads (like for making necklaces etc.). Many beads have rounded edges and most have holes in them (not optimal) which I would rather avoid, but they can be made to show up well with lighting (many are shiny and/or refractive which is visually good). A cubic mm to a cubic m is a 1: 1,000,000,000 relationship, which is what I want to demonstrate visually.