Can you provide a source for dust on Mars being jagged? If I understand correctly, this is true on the moon where erosive processes weren't present historically. But on Mars, we have ample evidence that they were for millions of years. Also, Mars dust particles are extremely small, with the majority of airborne dust in the 1-10 micron range (https://www.google.com/url?sa=t&source=web&rct=j&url=https:/...) although it sounds like sand may be larger (https://www.researchgate.net/publication/236899547_The_parti...), but I haven't seen any research on the shape.