Bluestone or more specifically Pennsylvania Bluestone is a form of sandstone that is quarried from the mountains of Upstate New York and Pennsylvania. Named for it’s bluish hue of color it usually comes in 2 main types of color schemes: Full Color Range (which consists of the primary blues and grays and also some browns and greens) and Blue Blue (which is purely just the blue and gray colors). These stones can be used in many pedestrian-only applications such as patios, walkways, steps, copings, and caps. Bluestone suppliers are able to provide many different types of cuts to match project needs. 9 Brothers Building Supply is one of Long Island’s top bluestone suppliers that carries a full variety of top quality bluestone straight from quarries and from leading stone manufacturers.