The pore size of micrometer-scale porous mineral materials ranges from 0.1 to 100 μm, and it is further divided into three subcategories: micrometer-scale small pore mineral materials (pore size from 0.1 to 1 μm), micrometer-scale medium pore mineral materials (pore size from 1 to 10 μm), and micrometer-scale large pore mineral materials (pore size > 10 μm). Their pores generally do not originate from the structural channels of crystals, but from the special natural genesis of mineral rocks or the products of artificial expansion. The pore structure characteristics can be observed through electron microscopes (SEM, TEM, etc.) and optical microscopes.