There is a wide variety of landscaping rocks. So, it is important to find the right one that will suit your landscaping needs.
Rock types include: cobble, conglomerate, granite, limestone, sandstone and slate. Plus some natural stones like basalt and marble can also be used in this field and they are not considered "rocks."
The most popular landscaping rock is the cobble stone which has a uniform texture of pebbles and grains of sandstone incorporated in small quantities with water.