Amazing, isn't it ? Sand, seen through the microscope, has the appearance of its bigger brothers: rocks and stones. And boulders, seen from a satelite, look just like sand. Nature surprises us again and again, showing the same structures on every possible scale. Fractality is all around us.   What exactly is Sand ?   Officially sand is everything that has grains, ranging from 0,05 mm till 2mm.   Smaller grains are called silt or clay, bigger grains we call gravel.   Composition is not the point:   when the size of the grains is within these parameters, it is sand. About sand: There are many hundreds of thousands of sands in the world.  Sand is not only beautiful, but very interesting too. It is very old; erosions by wind and water grinded the rocks into sand. Minerals mixed and gave color, variation and beauty to the sands in mountainous areas. Little sea-animals left their tiny skeletons in the white sands of tropical beaches. Fishes eat the corals; the leftovers leave them as coralsands. Delicate micro-shells and fossils of many sea creatures go unnoticed under your feet when you walk on the beach of your holiday destination. Sand has every imaginable color and structure:  Coarse brown and grey river sands, round red, orange and yellow desert sands, mixed colored mineral sands, white, tan, black or green beach sands, many colored lava sands. There's even blue and violet sand.... all SAND, whatever it's origin. And what's more: Almost no two sands are exactly alike. So why not collect them ?? It's impossible to cover the world in one lifetime, so sandcollectors are largely dependent on the sands they get from others. Sand is heavy (a minor set-back) and I can't very well expect people outside my own country to send me something from their local beach or river. Nevertheless it's greatly appreciated, and whoever does it can be assured of a picture of his sand in return. I need at least the quantity of a full film can, which is 30ml. Anyway, if you consider sending me something, please EMAIL ME FIRST. Email:   info@scienceart.nl Thank you very much!!!