Help identifying these rocks/minerals and knowing how best to clean them up. PLEASE!!! Thank you! in ROCKS, MINERALS and FOSSILS Posted October 31 Your purple rock is mica schist (purple mica is called lepidolite), I happen to have some samples from Australia myself. As far as the other stuff goes I'm not so sure what needs to be cleaned. If its dust/dirt covered you can rinse in and gently scrub in water. If you are trying to remove iron oxide stains iron out works well for that, for removing carbonate material you can try to remove with vinegar or stronger acids like muriatic.