The bluestone is specified as Blue/Blue, meaning that the color range stays more consistently blue as opposed to a full range of colors that could include shades of blue/green and mineral deposits. The surface was also specified as Thermal. Which means it was heat treated to remove the natural clefts and give the bluestone a smooth surface. The sizes range from 36"x36" to 12"x18". The pattern depends on the installer. The bluestone was supplied by local vendors, and they get their supply from different quarries in New England or overseas. So it is difficult to give you a specific stone manufacture's name.