For contrast, here are zoomable grains of lunar regolith[1] and random Earth sand[2]. Thus the insane abrasiveness, and use of crushed rock for simulant. [1] h

For contrast, here are zoomable grains of lunar regolith[1] and random Earth sand[2]. Thus the insane abrasiveness, and use of crushed rock for simulant. [1] https://virtualmicroscope.org/sites/default/files/html5Assets/70181/index2.html?specimen=/node/153 https://virtualmicroscope.org/sites/default/files/html5Asset... [2] https://www.virtualmicroscope.org/sites/default/files/html5Assets/leic0002/index2.html?specimen=/node/1232 https://www.virtualmicroscope.org/sites/default/files/html5A...