Whole continents are absent from her collection. Anne is accepting contributions. I asked Anne what she does with her students and her sand. She gave me an impressive list. Following is a sampling.
Samples are in small labeled zip bags.
Anne has large samples of some kinds of sand. Use three different sieves to compare two samples. Look at a sample under a microscope and draw what you see. Go to the map and find the sources of the sand. Mark the map with code letters to indicate color and texture of the sand found there.