Milestone Imports has been importing and distributing Porphyry in the United States and Canada since 1998. Today it is a leader in bringing exceptional value and service to our customers by representing Porphyry quarries from around the world including Mexico, Argentina, Brazil and China. Porphyry is a type of volcanic, igneous rock which, along with granite and other rock formations, makeup approximately 95 percent of the worlds “crust.” These rocks are the result of intense volcanic activity begun over 260 million years ago. Highly valued for its appearance, Porphyry natural stone pavers have been used for paving since ancient times. Many of these roads, plazas, and walkways are still used today.