M S International, Inc is the largest North American distributor of natural stone. Founded in 1975, Orange, California-based MSI is a worldwide distributor of porcelain and natural stone products, and the largest in the United States. Natural Stones are first quarried and then cut into blocks. After these blocks are further cut into a various sizes and shapes, the faces are polished hones, flamed, brushed, and hammered to produce the specified finish.