If you obtain the powder of a mineral by rubbing a mineral on a porcelain plate, which property have u observed?

let that person have a turn to speak : )

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?