1. Circa 0,5 kg sample is sawed in 1-cm thick slices using an ordinary slab saw.
2. After washing and drying, the slices are reduced in size to cm-large pieces by using a small sledge hammer.
3. In order to get a very fine-grained sample (almost powder), we use a small swing mill.
4. After adding some water, the sample is loaded in ca. 50 g portions on a Wilfley-Holman 700 water-shaking table, equipped with a 1270 mm fibreglass sanddeck, and repeated until all sample has been processed. We use a hand manget to remove magnetic minerals from the recovered high-density fraction. The whole procedure is shown in the video to the right.