Class I or Light Duty Limestone
This limestone is the softest of the three classes. Because it is so malleable, it is best used for carving. Choose this limestone for decorative pieces like fireplaces, crown molding, and art pieces.
Class II or Medium Duty Limestone
This stone is harder than Class I but softer than Class III and is used best for kitchen and bathroom flooring projects.
Class III or Heavy-Duty Limestone
This is the hardest limestone and is comparable to marble and is best used for commercial projects or countertops. Use this limestone class when completing a highly trafficked area of your home, like a patio, or in a commercial business.
Types of Limestone
While all limestone is made of sedimentary rock found in shallow waters, limestone is available in a variety of types, depending on where and how it is formed.
Travertine limestone is formed in caves by the precipitation of calcium carbonate on stalagmites and stalactites. This limestone is usually used in the home for kitchen or bathroom countertops or backsplashes.
Tufa limestone forms in or near lakes and hot springs that have a high calcium concentration. It’s usually light in color and can come in white, beige, or grey. This limestone makes good tile flooring.
This type of limestone is formed from broken shells, often on beaches. You can sometimes find fossils and shells throughout the tile, which makes it a great choice for pools, spas, and patios.