Granites and marbles have inherent characteristics, such as pits and micro-fissures, which may cause few concerns to some buyers. Slabs are commonly sold in a polished finish, giving them a high-gloss appearance. Upon closer inspection, however, you may notice that some stones have resin-filled pits on the surface. A few may have hairline cracks. These natural “imperfections” are unavoidable. But they do not affect the material’s hardness and strength. To fix the natural flaws in stone, manufacturers apply resin: to fill the pits and fissures occurring on the surface; to make the stone smoother to touch; and, to improve the strength of the slab. This technology has been the accepted solution in the stone industry for decades now. It has allowed stone manufacturers to reduce the number of broken pieces during production. Moreover, it has enabled them to create thinner slabs, thereby (a.) lowering the cost and (b.) opening doors to new construction applications. However, reinforced backing support (often a fiberglass mesh) is applied to protect marble, onyx, and travertine. Compared to granite, these stones are a bit more fragile, especially during transportation, fabrication, or installation. Hence, a solution to increase their durability is highly needed. A primary concern, though, with resin fillers is their safety for kitchen countertop surfaces. The material applied to the stone surface must comply with government health standards. Stone manufacturers must always ensure that the treatment done is safe for kitchen use. Resin provides an aesthetic fix to the stone’s natural flaws and ensures the strength of the slab itself. It improves the quality of the stone and, at the same time, reduces the cost of production. Furthermore, with the continuing development of this technology, we expect to see more improvements in the stone industry in the coming years.