You could just rinse, filter, repeat a few times. Calcium and some other contaminants you have will be water-soluble. Magnesium is insoluble. By
rinsing and filtering, it should be easier to sift through everything. Magnesium is quite shiny. Plus, it's paramagnetic. So there will be a weak
attraction towards magnets if you wanted to sift through with one.
Hope this helps! |