Which material is NOT a common stone product?

The selection of plastic as the answer highlights its distinction from the other materials listed. Granite, sandstone, and limestone are all types of natural stone, commonly used in construction and landscaping due to their durability and aesthetic appeal. Granite is an igneous rock known for its hardness and is often utilized for countertops and buildings. Sandstone, a sedimentary rock, is favored for its workability and natural appearance, making it a popular choice for architectural features and pavements. Limestone, another sedimentary rock, is frequently used in construction, as well as for producing lime for various industrial applications.

In contrast, plastic is a synthetic material made from polymers and is not classified as a stone product. It is widely utilized for a variety of applications but does not have the geological and material characteristics that define stone products. This fundamental difference confirms that plastic is not among the typical materials recognized as stone products.