Different types of particles used in physical exfoliants can be tailored based on one's skin type. For individuals with oilier skin, larger and more abrasive particles like pumice or magnesium oxide crystals are recommended as their skin can better tolerate these. On the other hand, those with drier, sensitive skin should opt for products containing smaller granules such as ruby crystals and jojoba beads. It is important to be cautious when selecting exfoliants as certain natural ingredients like crushed nutshells, seashells, ground fruit pits, and seeds may have uneven edges and irregular shapes that can potentially harm sensitive skin.